Multiple Center Buildings. Where two (2) or more centers are located under one (1) roof, they shall be considered one (1) center for purposes of layoff and job bidding. During the length of this agreement, if any of these cen- ters are removed from the same building in their entirety and not merged as outlined in Article 3, Section 7, of the CRT Supplement, they shall remain as one (1) center for purposes of layoff and job bidding.