Any cotton class certificate shall become invalid for use in the tender or delivery of the cotton covered thereby on a basis grade contract whenever such cotton shall be removed from the place of storage specified therein, except when it is handled and re-stored or transferred to a different place of storage and restored under the supervision of an exchange inspection agency or a supervisor of cotton inspection.
7 C.F.R. §27.44
90 Stat. 1841-1846; (7 U.S.C. 15b )