Colo. Rev. Stat. § 35-70-120
The term "soil erosion district" as used in "The Colorado Soil Conservation Act of 1937" and "conservation district" as used in this article shall be deemed synonymous. Districts organized after April 3, 1941, shall be known as conservation districts, and districts organized before April 3, 1941, may be known either as soil erosion districts or as conservation districts, as determined by the supervisors of such districts. The change of name permitted by this section shall not affect in any way the rights or obligations of districts or landowners or impair the obligations of any contract to which any such district is a party at the time of such change of name.
C.R.S. § 35-70-120
"The Colorado Soil Conservation Act", enacted in 1937, first appeared in the 1941 and 1942 supplements to the 1935 Colorado Statutes Annotated before being compiled into volume 4B, 1949 replacement volume, of the 1935 Colorado Statutes Annotated.