Appeals from orders of Municipality.

(1) Any perSOIl aQ9rieved- (a) by the ref~ll of a Municipality under section 166 to eenct ion the erection or re-erection of a bui Idln'l; or (b) by a notice' trom a Municipality under section 168 requjring the alteration or demoli tion of 0. bui 1 o.ing; may appeal .within tltirty days from the date of such notice or reflli~al, to such officer as the Administrator, may cppotnt in this behal f or failing such appointment to the Deputy Commissioner but no 3uch notice or ref~l shall be liable to be called in question oth&:l-wise than by such eppee l , (2) The eppea i late authority may. it if thinks 'fit extend the period allowed by sub-sect iont L) for appee l , ing the notice or refusal appealed from shall he final: Provided that the notice or refusal shall not he ,modified or set aside until the ~ppellant and the' Municipality have had a reasonable opportunity of beWq heard.