N.H. Code Admin. R. Rev 608.02
All contracts shall contain a statement relative to addendums, amendments, and appendixes as follows:
"ADDENDUMS, AMENDMENTS AND APPENDIXES: Addendums, amendments and appendixes may be added only by separate instrument in writing and shall meet all requirements of Rev 602."
Source. (See Revision Note #1 at chapter heading for Rev 600) #10581, eff 5-1-14; ss by #13916, eff 3-28-24 (see Revision Note #2 at chapter heading for Rev 600)