This terminology has been used frequently in relation to Upper Rissington Parish Council over the last 4 years. Below is an explanation from the cpalc website.
Below is information from the Parish Toolkit. I have not included specific information from the toolkit as it assumes only one person has applied for Co-Option and not up to FOUR as we could have today.
7. CO-OPTION OF MEMBERS
Section 21 of the Representation of the People Act 1985 gives the Parish Council the power of co-option to fill vacancies remaining unfilled following an ordinary election.
There are ——— vacancies –
——– Ward – — vacancies ——– Ward – — vacancies
(1) That the Council believes that it is in the interests of the parish that the vacancies on the Council are filled, and that this be achieved by co-option.
(2) That persons eligible to become co-opted be encouraged to put their names forward to the Chair.
(3) That consideration be given to a process of selection at the next meeting.
Eligibility for co-option, is as follows:
(a) 21 years of age, and
Be a local government elector for the parish, or
Be an occupier (owner or tenant) of land or premises in the parish for the previous 12 months, or
Have their place of work in the parish for the previous 12 months, or
Have resided in the parish for the previous 12 months, or Have resided within three miles of the parish boundary for the previous 12 months.