15 C.F.R. § 996.22
(a) A hydrographic product that has passed the compliance tests shall automatically be considered for certification by NOAA. NOAA shall make its certification determination, if its other obligations permit, within 60 calendar days following receipt of the compliance test results. NOAA shall make a certification determination based upon the following criteria:
(d) A certification may be renewed, at the request of sponsor and the option of NOAA, for a period of 2 years. Sponsors may request the renewal of a certification by writing to the Quality Assurance Program address at least 120 calendar days before the expiration of an existing certification. The request shall include: