Explanation: "advance notice of termination" - uprzedzenie o rozwiazanniu umowy o prace (wypowiedzeniu)
w kontraktach zazwyczaj tak to wyglada:
Either party reserves [or all parties reserve] the right to terminate the contract/agreement by giving/providing two weeks advance notice.
ewentualnie "by giving two weeks notice in advance"
"by giving a two-week notice in advance"