43 C.F.R. § 6.2
(d) An invention report shall include the following:
(10) A statement that the employee:
(i) Is willing to and does hereby assign to the Government:
(a) The entire rights (foreign and domestic) in the invention;
(b) The domestic rights only, but grants to the Government an option to file for patent protection in any foreign country, said option to expire as to any country when it is decided not to file thereon in the United States, or within six months after such filing;
(e) If the inventor believes that he is not required by the regulations in this subpart to assign to the Government the entire domestic right, title, and interest in and to the invention, and if he is unwilling to make such an assignment to the Government, he shall, in his invention report, request that the Solicitor determine the respective rights of the Government and of the inventor in the invention, and he shall include in his invention report information on the following points, in addition to the data called for in paragraph (d) of this section: