(a) This Part shall apply to the construction of each new residential structure and to each addition to or rehabilitation of an existing residential structure, when:

1. (1) truss type construction, pre-engineered wood construction, and/or timber construction is utilized in such construction, addition or rehabilitation; and

2. (2) such construction, addition or rehabilitation:

   1. (i) was commenced on or after January 1, 2015; or
   2. (ii) was commenced prior to January 1, 2015 and was not completed prior to January 1, 2015.