any statute, bylaws, r=solutzons or other authorities, all of which may be exercised as =nough this Covenant had not been made. Non-Enforcement 11. The City be under no obligation to enforce any of the provisions of th: Covenant. Notice 12. Whenever prcvision is made for notice to be given to the Covenantor under this Covenant, notice shall be deemed to have been given when delivered personally to an officer or director of the Covenantor or when mailed by prepaid registered mail to the registered or records office of the Covenantor, on the fourth day following the date of mailing. Severability 13. If any section or lessor portion of this Covenant is held invalid for any reason, the invalid portion shall be severed from this Covenant and the validity of the remainder of the Covenant shall not be affected. Amendment and Waiver 14. No amendment or waiver of any provision in this Covenant shall be valid unless it is made in writing and executed on behalf of the Covenantor and the City.