A variance granted under this chapter shall automatically expire
if a building permit for construction in accordance with the plans
for which such variance was granted has not been issued within one
year of the date of the variance and if all construction is not completed
within two years of the date of issuance of the building permit, or
if both have not occurred within such other time limits as may be
established by the Board of Appeals in connection with its decision.
Such time limits shall be tolled by any judicial proceedings to review
the Board's decision.
After an application has been decided, no matter presented to
the Board of Appeals shall again be presented to or entertained by
said Board within a period of three years from the date of such decision
or determination or, if renewed by the courts, within the same period
after the final adjudication thereof, except upon a showing by the
applicant, to the satisfaction of the Board of Appeals, that there
has been a material change in the circumstances under consideration
in the original proceeding.