14 CFR § 450.33 - Incremental review and determinations.
An applicant may submit its application for a safety review in modules using an incremental approach approved by the Administrator.
(a) An applicant must identify to the Administrator, prior to submitting an application, whether it will submit a modular application for any approval or determination.
(b) An applicant using an incremental approach must have the approach approved by the Administrator prior to submitting an application. In reviewing a proposed approach, the Administrator will consider the following:
(1) Whether the modules can be reviewed independently; and
(2) Whether the modules will be submitted in a workable chronological order.
(c) The Administrator may make incremental determinations as part of this review process.
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