OPINION

HOLDER, Justice.

This appeal addresses the General Assembly's power to delegate rule-making authority to administrative agencies. The Court of Appeals held that the General Assembly could not constitutionally delegate power to the Tennessee Wildlife Resources Commission ("TWRC") to add or delete animals from the dangerous species list. We reverse and hold that the legislature may delegate power to add and delete items from a statutory schedule absent explicit guidance standards. The legislature, however, must provide a basic standard accompanied by a general policy when delegating in areas concerning public health, safety, and general welfare.

BACKGROUND

The plaintiffs, Robert Bean et al., claimed to be owners, dealers, or licensed propagators of various wildlife species. They filed a complaint seeking a declaratory judgment against the defendants, the TWRC and the Director of the Tennessee Wildlife Resources Agency ("Director"). The plaintiffs alleged that Tenn. Code Ann. § 70-4-403(1) (3) violated the Tennessee Constitution by unlawfully delegating legislative authority to both the TWRC and to the Director.

The trial court granted the plaintiffs' petition. The trial court held the delegation unconstitutional because "the legislature did not provide the agencies with any standards by which they were to proceed in deleting or adding species under [the statute]." The Court of Appeals affirmed the trial court and held that the delegation was unconstitutional due to the absence of specific standards. The appellate court reasoned that, absent specific standards, the statute vests the TWRC and the Director with "the discretion to determine what the law shall be as opposed to discretion as to the law's execution."

We find the delegation of power constitutionally valid. For the reasons stated below, we reverse the Court of Appeals and dismiss the case.

STATUTORY LANGUAGE

The issue in controversy concerns the statutory provisions in Tenn. Code Ann. § 70-4-403(1) (3). This statute classifies Tennessee wildlife into five (5) general classes. Class I includes "all species inherently dangerous to humans." Class II includes all native species ("presently occurring in the wild") not listed in another class. Class III is a domestic or semi-domestic class of animals that: (1) is not listed in other classifications; and (2) requires "no permits except those required by the department of agriculture." Class IV includes native species that may only be possessed by zoos and temporary exhibitors. Class V includes species that are injurious to the environment.

This appeals focuses on Class I and Class III. Class I provides that "[t]he commission, in conjunction with the commissioner of agriculture, may add or delete species from the list of Class I wildlife by promulgating rules and regulations." Tenn. Code Ann. § 70-4-403(1). Class III permits "[t]he commission, in conjunction with the commissioner of agriculture, [to] add or delete species from the list of Class III wildlife by promulgating rules and regulations." The delegation of the authority to add and delete species from Class I and Class III is the focus of this appeal by the defendants. Tenn. Code Ann. § 70-4-403(3).

ANALYSIS

The General Assembly may grant an administrative agency the power to promulgate rules and regulations which have the effect of law in the agency's area of operation. Tasco v. Long, 212 Tenn. 96, 368 S.W.2d 65, 68-69 (1963). This grant of power, however, should be limited and defined in such a manner that administrative officials can discern and implement the legislature's will. 16 C.J.S. Constitutional Law § 137, 448-49 (1984). An administrative agency may be afforded discretion as to implementation of legislative policy but not as to determination of that policy. State v. Edwards, 572 S.W.2d 917, 919 (Tenn. 1978).

Our review of previous case law reveals that this Court has never succinctly stated a test for determining whether a delegation of power is constitutional. In Lobelville Special School District v. McCanless, 381 S.W.2d 273 (Tenn. 1964), this Court quoted 16 C.J.S. Constitutional Law § 133, 560-61 for the proposition that lawful delegations require a "sufficient basic standard" accompanied by "a definite and certain policy and rule of action." Id. 381 S.W.2d at 274. Legislative delegations must also contain sufficient safeguards to prevent agencies from acting in an arbitrary manner. State v. Edwards, 572 S.W.2d 917, 919 (Tenn. 1978); Tasco Developing and Building Corp. v. Long, 212 Tenn. 96, 368 S.W.2d 65 (1963). Prior case law, however, has not enunciated criteria for analyzing whether the legislature's guidelines or standards are adequate to prevent arbitrary action.

We are mindful of the need for guidance in this area. We have reexamined Tasco and its progeny and have created a test for analyzing the adequacy of the standards or guidelines contained in a statute alleged to have unlawfully delegated legislative power. We, therefore, hold that the test for determining whether a statute is an unlawful delegation is whether the statute contains sufficient standards or guidelines to enable both the agency and the courts to determine if the agency is carrying out the legislature's intent.

Governing standards need not be expressed provided such standards can be reasonably ascertained from the statutory scheme as a whole. The necessity of expressed standards is contingent upon the statute's subject matter and on the degree of difficulty involved in articulating finite standards. Detailed or specific legislation may be neither required nor feasible when the subject matter requires an agency's expertise and flexibility to deal with complex and changing conditions.

The requirement of expressed standards may also be relaxed when the discretion to be exercised relates to or regulates for the protection of the public's health, safety, and welfare. In Tasco v. Long, 212 Tenn. 96, 368 S.W.2d 65 (1963), this Court was confronted with a statute that delegated powers to a board to grant general contractor licenses. The statute stated that the board

shall have the power to make such by-laws, rules, and regulations as it shall deem best, providing the same are not in conflict with the laws of Tennessee.

Id. 368 S.W.2d at 67. We interpreted the statute's standard as one of reasonableness. Id. at 67-69. The board, therefore, was given the discretion to act provided its decisions were neither arbitrary nor capricious and were in harmony with the laws of this state. Id. Although these guidelines were vague, they were held sufficient under the circumstances.

In Tasco, we found that the policy behind the statute was "to protect the general public from contractors who are not qualified to perform work which they have contracted . . ." Id. at 68. Accordingly, Tasco teaches us that minutely detailed standards are not required when the statute's policy relates to public health, safety, or welfare and when flexibility is necessary for practical legislation.

The legislative policy of the present statute is clear. The statute outlines a general scheme designed to protect the public from dangerous animals. If the agency adds a non-enumerated animal to one of the legislative classes, that species is regulated pursuant to the legislative scheme. The mere adding or deleting of animals from a nonexclusive list or moving an animal from one classification to another does not alter the legislative policy of providing public protection. See State v. Edwards, 572 S.W.2d 917 (Tenn. 1978) (holding adding and deleting items from a non-exclusive list permissible).

Because the present statute concerns issues of public safety and welfare, the requirement of expressed or specific standards is relaxed. The legislative standard for adding an animal to Class I is whether the animal is "inherently dangerous." The legislature has also provided a non-exclusive list, in both Class I and Class III, of animals falling within the legislatively-created categories or classifications. These lists provide the agency with additional criteria for classifying animals.

We have carefully considered the entire statutory scheme and find that the statute implies a standard of reasonableness. We further find that the statute's guidelines are that animals possessing characteristics consistent with the legislature's listed examples and statutory definitions are to be classified pursuant to the legislative scheme. These standards are clearly adequate to allow both us and the TWRC to determine whether the legislature's intent is being furthered.

We hold the present delegation of power constitutional. We reverse the Court of Appeals judgment and remand for further proceedings consistent with this opinion. Costs of this appeal are taxed to the appellees, Robert Bean et al., for which execution may issue if necessary.

ANDERSON, C.J., and DROWOTA, REID and BIRCH, JJ., concur.