ETASSUM42340 | Schedule 4 Company Share Option Plan (CSOP): Eligibility of individuals to participate: The "no material interest" requirement: Associates
From HM Revenue & Customs · Employee Tax Advantaged Share Scheme User Manual
The meaning of associate is given in paragraph 12 Schedule 4 ITEPA as:
any relative or partner of that individual (spouse or civil partner, parent, child or other lineal descendant, brother or sister),
the trustee or trustees of any settlement of which the individual or any of the individual’s relatives is or was a settlor,
where the individual is interested in any shares which are subject to any trust or part of the estate of a deceased person, the trustee or trustees of that settlement or the personal representatives of the deceased are associates.