(1)
The performance level of a building after construction shall not be less than the performance level of the building prior to construction.
(2)
For the purposes of Sentence (1), reduction of performance level shall be determined in accordance with Articles 11.4.2.1., 11.4.2.3., 11.4.2.5. and 11.4.2.6.
(3)
Where proposed construction would reduce the performance level of an existing building, compensating construction shall be required in conformance with Articles 11.4.3.1., 11.4.3.2., 11.4.3.4., 11.4.3.6. and 11.4.3.7.
(4)
Section 11.5. applies in respect of the requirements of Sentences 11.4.3.4.(1), (3) and (4).