# The Social Security (Earnings Factor) Regulations 1979, Paragraph 1


(1) In this Part of this Schedule—
“Class 1 contributions” means primary Class 1 contributions paid or treated as paid on so much of a person’s earnings as do not exceed the current upper earnings limit or the prescribed equivalent if he is paid otherwise than weekly;
“contracted-out contributions” means primary Class 1 contributions paid or treated as paid on so much of a person’s earnings in respect of any contracted-out employment as exceed the current lower earnings limit but do not exceed the current upper earnings limit or the prescribed equivalents if he is paid otherwise than weekly;
“the standard level” in relation to any year means that year’s lower earnings limit for primary Class 1 contributions multiplied by 50; and
each paragraph has effect subject to the provisions of all later paragraphs.
(2) Paragraphs 2, 3 and 4 below shall apply for the purposes specified in section 13(2) of the Act, or section 2(4) of the Pensions Act 2014, and paragraph 5 below for the purposes of section 35 of the Social Security Pensions Act1975 (earner’s guaranteed minimum).

---
Source: https://www.legislation.gov.uk/uksi/1979/676/schedule/paragraph/1 (the official version)
Page: https://openlegislation.uk/social-security-earnings-factor-regulations-1979/schedule/paragraph-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.