They must be a proportionate means of ensuring the supplier’s relevant capacity or ability (see below), having regard to the nature, complexity and cost of the public contract.
Mae’n rhaid iddynt fod yn ffordd gymesur o sicrhau adnoddau neu allu perthnasol y cyflenwr (gweler isod), ar ôl rhoi sylw i natur, cymhlethdod a chost y contract cyhoeddus.