English: work to rule
Welsh: gweithio yn ôl y rheolau
Subject: Gwleidyddiaeth
Welsh definition: Work-to-rule is an industrial action in which employees are entitled to do no more than the minimum required by the rules of their contract, and precisely follow all safety or other regulations, which may cause a slowdown or decrease in productivity, as they are no longer working during breaks or during unpaid extended hours and weekends (checking email, for instance).