Borrower assents to any extension, modification or waiver of any obligation of Note Holders and Secured Parties.  No waiver or modification of any of the provisions hereof shall be binding on Note Holders and Secured Parties unless in writing and signed by Note Holders and Secured Parties and no waiver by Note Holders and Secured Parties of any rights they may have hereunder shall be deemed a waiver of any other rights they may have. All rights and remedies of Note Holders and Secured Parties shall be cumulative and may be exercised singly or concurrently.