The Michigan historical commission be and it is hereby designated as the agency of the state of Michigan to receive and safely keep the transcripts, documents and records of the land office or land offices formerly maintained by the United States in the state of Michigan; and that any and all authorities of the United States be and they are hereby allowed to have free access to the same at any time without cost or expense to them, as provided by the act of congress, approved May 28, 1926, entitled “An act to provide for the transfer of certain records of the general land office to states and for other purposes.”