16 U.S. Code § 4303 - Management actions
Not later than nine months after November 18, 1988, the Secretary shall issue such regulations as he deems necessary to achieve the purposes of this chapter. Regulations shall include, but not be limited to, criteria for the identification of significant caves. The Secretaries shall cooperate and consult with one another in preparation of the regulations. To the extent practical, regulations promulgated by the respective Secretaries should be similar.