NRW must be provided with evidence that a reasonable and proportionate attempt has been made to contact relevant individuals, such as sending a letter and allowing 28 days for response.
Rhaid darparu tystiolaeth i CNC bod ymgais resymol a chymesur wedi’i gwneud i gysylltu ag unigolion perthnasol, fel anfon llythyr a chaniatáu 28 diwrnod i ymateb.