Guarantee Of Improvements. Unless otherwise provided for in the conditions of the ordinance governing a "PID" District, no building permits or permits authorizing the occupancy or use of any Building, facility, commercial establishment, or Structure may be use or occupied until required related off-site improvements are constructed or a performance bond, escrow, or other acceptable instrument is posted covering their estimated cost as determined by the Director. This requirement shall not apply to foundation permits or permits necessary for the installation of required related off-site improvements. Required related off-site improvements shall include, but not be limited to, Streets, sidewalks, sanitary and storm sewers, streetlights, and landscaping and trees. If a "PID" District is developed in phases, the requirement shall also apply to all major improvements necessary to the proper operation and function of the phase in question as determined by the Director, even though such improvements may be located outside of the phase in question.