14 C.F.R. § 450.31 – General.

(a) To obtain a vehicle operator license, an applicant must—
1. (1) Submit a license application in accordance with the procedures in part 413 of this chapter;
2. (2) Obtain a policy approval from the Administrator in accordance with § 450.41;
3. (3) Obtain a favorable payload determination from the Administrator in accordance with § 450.43, if applicable;
4. (4) Obtain a safety approval from the Administrator in accordance with § 450.45;
5. (5) Satisfy the environmental review requirements of § 450.47; and
6. (6) Provide the information required by appendix A of part 440 for the Administrator to conduct a maximum probable loss analysis for the applicable licensed operation.
(b) An applicant may apply for the approvals and determinations in paragraphs (a)(2) through (6) of this section separately or all together in one complete application, using the application procedures contained in part 413 of this chapter.
(c) An applicant may also apply for a safety approval in an incremental manner, in accordance with § 450.33.
(d) An applicant may reference materials previously provided as part of a license application in order to meet the application requirements of this part.