The building official may prescribe mandatory inspections of public domestic water well projects, and of projects on which he deems it likely that strata seals will be required pursuant to Section 13.16.430. The stage at which each such inspection is required shall be set forth in the permit. It is unlawful for any person to continue work on a project past the stage at which an inspection has been prescribed pursuant to this section until such inspection by the building official has been completed; except that, a permittee, or one acting on his behalf, may make an appointment with the building official, by telephone or otherwise, to have the inspection carried out at or following a time agreed upon at which it is contemplated the inspection stage will have been reached, but not less than twenty-four (24) hours following the time the appointment is made, and, if the building official does not appear to make the inspection within one hour following the time specified, work on the project may lawfully proceed. (Prior code § 7775)