C.  Terms of Affordability; New and Existing Inclusionary Units:

For both for sale and rental inclusionary units, affordability and occupancy restrictions shall remain in effect in perpetuity and shall apply to any replacement structure or structures constructed if a structure containing an inclusionary unit or units is demolished or destroyed, provided that if demolition or destruction of a structure containing inclusionary units occurs 55 years or more after recording of the restrictions and said demolition or destruction was unintentional, restrictions on the units in the structure shall terminate on demolition or destruction. For-sale and rental inclusionary units approved before an amendment to this Chapter shall remain subject to the terms of this Chapter at the time the units were approved, and for-sale and rental inclusionary units in pending developments shall remain subject to the terms of this Chapter at the time the pending development application was deemed complete, subject in all cases to section 18.40.100.D. of this Chapter and further provided that, where a for-sale inclusionary unit is transferred and the new owner is required to enter into new regulatory documents under this Chapter, the new regulatory documents will provide for affordability in perpetuity.  (Underline added.)