Section 273.4 - Applicability-Mercury-containing equipment(a)Mercury-containing equipment covered under this part 273. The requirements of this part apply to persons managing mercury-containing equipment, as described in § 273.9 , except those listed in paragraph (b) of this section.(b)Mercury-containing equipment not covered under this part 273. The requirements of this part do not apply to persons managing the following mercury-containing equipment:(1) Mercury-containing equipment that is not yet a waste under part 261 of this chapter. Paragraph (c) of this section describes when mercury-containing equipment becomes a waste;(2) Mercury-containing equipment that is not a hazardous waste. Mercury-containing equipment is a hazardous waste if it exhibits one or more of the characteristics identified in part 261, subpart C of this chapter or is listed in part 261, subpart D of this chapter; and(3) Equipment and devices from which the mercury-containing components have been removed.(c)Generation of waste mercury-containing equipment.(1) Used mercury-containing equipment becomes a waste on the date it is discarded.(2) Unused mercury-containing equipment becomes a waste on the date the handler decides to discard it. 70 FR 45520 , Aug. 5, 2005