(1) All single-walled steel tanks in-service and temporarily out-of-service shall be permanently closed and removed from the ground or permanently closed in-place in compliance with 310 CMR 80.43 by August 7, 2017, except for the following tanks:

1. (a) Consumptive use tanks; and

2. (b) Tanks that were relined prior to August 8, 2007 in accordance with API 1631, 1983 Edition and the Owner or Operator has the following:

   1. 1. A permit and approval that was issued by the Head of the Fire Department for such relining; and
   2. 2. A current, legally valid warranty for said relining.