The provisions of these rules and regulations
with respect to the meaning of technical terms and phrases, the restrictions
as to what wastes may be discharged into sewers, the regulations with
respect to making connections to sewers and other technical matters
shall be interpreted and administered by the Authority. Details as
to sewer use, sewer connections, etc., not otherwise regulated or
described by some provision of these rules and regulations shall continue
as heretofore established by local custom and practice as interpreted
by the Authority.