During AT&T. 13STATE delivery interval, if engineering design work is complete, which includes asbestos removal, HVAC installation, filtration, floor loading, floor preparation, overhead racking placement, and one hundred percent (100%) of the non-recurring charges have been received by AT&T-13STATE, Collocator and/or their AT&T-13STATE Approved Tier 1 Vendor (s) may request AT&T-13STATE to do work in parallel with AT&T-13STATE throughout the remaining delivery interval. The Collocator must obtain an approved Method of Procedures (MOP) from AT&T-13STATE and follow AT&T-13STATE’s Technical Publications for installation of equipment and facilities. Security Card requirements in Section 18.3.6 of this Appendix will apply.