129. In this Part—
“date of the ballot” means, in the case of a ballot in which votes may be cast on more than one day, the last of those days;
“strike” means[F1 (except for the purposes of Article 110(3))] any concerted stoppage of work;
“working hours”, in relation to a person, means any time when under his contract of employment, or other contract personally to do work or perform services, he is required to be at work.