# Pneumoconiosis etc. (Workers’ Compensation) Act 1979, Paragraph 4


A person is not a relevant employer in relation to a person disabled by a disease to which this Act applies if the disabled person's qualifying period of employment with him—
(a) did not exceed 5 years, and
(b) represents not more than 25% of the time during which the disabled person was employed in a prescribed occupation.

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Source: https://www.legislation.gov.uk/ukpga/1979/41/schedule/paragraph/4 (the official version)
Page: https://openlegislation.uk/pneumoconiosis-etc-workers-compensation-act-1979/schedule/paragraph-4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.