Unfortunately PL400 says a license isn't issued until "all statements in a PROPER APPLICATION for a license are true." That proper application isn't completed until your interview.
If the application is filed with true statements, its is a filed application and meets that PL 400 section. Period. Its like saying unilaterally you don't have to pay your taxes until you talk to your accoutant and you schedule your accountant nine months after April 15. It doesn't work that way; its up to the police to do their investigation timely. And an "interview" procedure is not even in the Penal Law. It's a police made up rule, not law. If they take too long to investigate, or because they want an interview (again, not in the Penal Law), thats their problem, not the applicant's. To allow the police to claim otherwise effectively makes them legislators who can unilaterally erase this section of a criminal statute (a power they don't have) at the expense of a civil right.
4-a. Processing of license applications. Applications for licenses
shall be accepted for processing by the licensing officer a
t the time of
presentment. Except upon written notice to the applicant specifically
stating the reasons for any delay, in each case the licensing officer
shall act upon any application for a license pursuant to this section
within six months of the date of presentment of such an application to
the appropriate authority. Such delay may only be for good cause and
with respect to the applicant. In acting upon an application, the
licensing officer shall either deny the application for reasons
specifically and concisely stated in writing or grant the application
and issue the license applied for.