Waivers shall be effective on the following dates:

(a) For advance waivers of identified inventions, i.e., inventions conceived prior to the effective date of the contract, on the effective date of the contract, even though the advance waiver may have been requested after that date;

(b) For identified inventions under advance waivers, i.e., inventions conceived or first actually reduced to practice after the effective date of the contract, on the date the invention is reported with the election to retain rights as to that invention; and

(c) For waivers of identified inventions (other than under an advance waiver), on the date of the letter from Patent Counsel notifying the requestor that the waiver has been granted.