# The Guarantee Payments (Exemption) (No. 9) Order 1977, Paragraph 5


The basic weekly wage for pieceworkers shall be assessed subject to the following conditions:
(a) The basic weekly wage shall be calculated according to the piece-worker's average earnings for a 40 hour week, exclusive of overtime and all time lost by the employee on account of bad time keeping, during a period of four full consecutive weeks of normal productive employment.
(b) Where either the employer or the employee consider the average weekly earnings, assessed in accordance with paragraph (a) above to be inappropriate or unfair, an alternative period of four full weeks of normal productive employment shall be agreed. Where such alternative period is not available an agreed figure shall be established by negotiation. If the employer and employee fail to agree upon an alternative period or figure the usual procedure of negotiation shall be used to settle the dispute.
(c) The basic weekly wage of all new piecework employees shall be assessed in accordance with paragraph (a) above within a period of 9 weeks from the date of taking up employment.
(d) The employer shall inform each pieceworker of the basic weekly wage assessed in accordance with (a) above.

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Source: https://www.legislation.gov.uk/uksi/1977/1349/schedule/2/paragraph/5 (the official version)
Page: https://openlegislation.uk/guarantee-payments-exemption-no-9-order-1977/schedule-2/paragraph-5
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.