Moses Mawire v Rio Zim Limited (Private) Limited

The appellant was employed by the respondent as a Human Resources Superintendent from 1 November 2006. His contract included locality allowance, leave bonus, and a company vehicle. In February 2009, following Zimbabwe's shift from the Zimbabwean dollar to the US dollar, the respondent notified the appellant his salary would be US$4,147.43 per month without mentioning allowances. In March 2009, a memorandum informed all employees that transport and meals allowances and leave bonuses would fall away for employees in grade 10 and above effective 1 March 2009. The appellant received this globular salary without allowances for five years. In June 2014, he raised a complaint claiming outstanding locality allowances (February 2009-June 2014), leave bonuses (2009-2013), and mileage for use of his personal vehicle (March 2007-2014). The matter proceeded to arbitration where the appellant was awarded US$197,563.00. The respondent appealed to the Labour Court, which set aside the arbitral award on grounds of prescription and variation of contract by conduct.

• Whether the appellant's claims had prescribed in terms of section 94 of the Labour Act
• Whether the claims constituted a continuing unfair labour practice exempt from the two-year prescription period under section 94(2)
• Whether the contract of employment had been validly varied by the respondent's memorandum and the appellant's conduct
• Whether rights under the Labour Act are 'frozen' during employment and can only be actioned after termination of employment

The appeal was dismissed with costs. The Labour Court's decision setting aside the arbitral award was upheld.

1. Under section 94(1)(b) of the Labour Act, each non-payment of contractual allowances or bonuses constitutes a complete and separate cause of action that prescribes within two years from the date when the dispute or unfair labour practice first arose. 2. Claims for non-payment of allowances do not constitute a 'continuing' unfair labour practice under section 94(2) of the Labour Act merely because non-payments recur monthly or annually - each non-payment is a discrete infraction. 3. Rights conferred by the Labour Act are not 'frozen' during the subsistence of an employment relationship and can be enforced during employment within the prescribed time limits. 4. A contract of employment can be varied by implied consent, which may be demonstrated through conduct. Where an employee accepts modified terms of employment for an extended period (in this case five years) without raising objection, this constitutes implied consent to the variation under the principle in Smith v Hughes. 5. A human resources practitioner who accepts payment under varied contract terms for five years is deemed to have accepted those variations by conduct, particularly where no complaint is raised during that period.

The court noted that the appellant abandoned the third ground of appeal relating to motor vehicle compensation at the beginning of the hearing, which notably formed the bulk of his original claim. The court observed that Mr. Musarurwa attempted to argue on appeal that the court could consider only claims less than two years old (those not yet prescribed), but this was rejected as it was never the appellant's case in the lower proceedings, and a litigant cannot argue a different case on appeal than was presented below. The court also made an observation about the nature of continuous unfair labour practices by referring to South African jurisprudence, particularly distinguishing between single acts (like a once-off bonus decision) and truly continuous practices (like ongoing differential wage payments based on race). The court described the appellant's submission that Labour Act rights are frozen during employment as 'judicial heresy' and 'not worthy of any notice due to its frivolity.'

This case establishes important principles in Zimbabwean labour law regarding: (1) the application of prescription to employment-related claims, clarifying that each non-payment constitutes a separate cause of action subject to the two-year prescription period rather than being a continuing unfair labour practice; (2) the doctrine of implied consent to contract variation through conduct, particularly where an employee accepts modified terms for an extended period without objection; (3) the rejection of the concept that labour law rights are 'frozen' during employment and can only be enforced after termination; and (4) the standard for what constitutes a 'continuing' unfair labour practice under section 94(2) of the Labour Act. The case demonstrates the courts' approach to balancing employee protection with commercial realities during periods of economic upheaval and currency changes.