Assignment, Amendments, Waiver, and Contract Complete. Assignment. The Contractor may neither assign nor transfer any rights or obligations under this Contract.A partition action enables you to force the sale of property when coowners are refusing to sell. Minnesota specifically does not allow lien rights to be waived in the contract for work, and any such waiver is void and unenforceable. Do you need a Release or Waiver Agreement Form in Minnesota? Create, print or download your Minnesota Release or Waiver Agreement form for free.