any power or duty of a community council to co-opt a person to fill a casual vacancy in the membership of the council under rules made under section 36A of the 1983 Act
unrhyw bŵer neu ddyletswydd sydd gan gyngor cymuned i gyfethol rhywun i lenwi sedd wag yn aelodaeth y cyngor o dan reolau a wneir o dan adran 36A o Ddeddf 1983