For purposes of this section, an impasse or stalemate shall be deemed to occur in the collective bargaining process if the parties do not reach a settlement of the issue or issues in dispute by way of a written agreement within thirty days after collective bargaining proceedings have been initiated.
In the case of disputes involving political subdivisions of the Commonwealth, the agreement shall be deemed not approved within the meaning of this section if it is not approved by the appropriate lawmaking body within one month after the agreement is reached by way of collective bargaining.
In the case of disputes involving the Commonwealth, the agreement shall be deemed not approved within the meaning of this section if it is not approved by the Legislature within six months after the agreement is reached by way of collective bargaining.
43 P.S. § 217.4