29 U.S.C. § 1815

During the period for which the certificate of registration is in effect, each farm labor contractor shall— (1) provide to the Secretary within thirty days a notice of each change of permanent place of residence; and (2) apply to the Secretary to amend the certificate of registration whenever the farm labor contractor intends to— (A) engage in another farm labor contracting activity, (B) use, or cause to be used, another vehicle than that covered by the certificate to transport any migrant or seasonal agricultural worker, or (C) use, or cause to be used, another real property or facility to house any migrant agricultural worker than that covered by the certificate.