20.2. No strike may be declared unless it has been authorized by secret ballot decided by the majority vote of the members of the certified association who are comprised in the bargaining unit and who exercise their right to vote.
The association shall take the measures necessary, having regard to the circumstances, to inform its members, at least forty-eight hours in advance, that the ballot is to be held.
If the association is authorized to declare a strike, it shall notify the Minister thereof in writing within forty-eight hours following the polling.