Section 51.304 - Responsibilities(a) The following persons have the authority to approve actions in Accident Potential Zones: (1) For programs subject to environmental review under 24 CFR part 58 : the Certifying Officer of the responsible entity as defined in 24 CFR part 58.(2) For all other HUD programs: the HUD approving official having approval authority for the project.(b) The following persons have the authority to approve actions in Runway Clear Zones and Clear Zones: (1) For programs subject to environmental review under 24 CFR part 58 : The Certifying Officer of the responsible entity as defined in 24 CFR part 58.(2) For all other HUD programs: the Program Assistant Secretary.61 FR 13335, Mar. 26, 1996