by the United States government

“ The rights and powers of a trustee under sections 544, 545, and 549 of this title are subject to any generally applicable law that— (A) permits perfection of an interest in property to be effective against an entity that acquires rights in such property before the date of perfection ”

“ Notwithstanding sections 544, 545, 547, 548 (a) (1) (B) , and 548 (b) the trustee may not avoid a transfer made by or to (or for the benefit of) a master netting agreement participant under or in connection with any master netting agreement or any individual contract covered thereby that is made before the commencement of the case, except under section 548 (a) (1) (A) and except to the extent that the trustee could otherwise avoid such a transfer made under an individual contract covered by such master netting agreement. ”