Strike notice procedure requires written intimation to the employer, with reasons stated and copies sent to labour authorities. Notice of strike by a union or group of workers requires a written intimation to the employer in the prescribed form, stating that a strike is proposed on a specified date and setting out the reasons in an annexure. The notice must be issued by the secretary of the union or by five duly elected worker representatives, with the relevant resolution attached. Copies of the notice are to be sent to the conciliation officer and specified labour authorities.