10.4 Category (d) is included to avoid the need for an additional authorisation process to be undertaken in a case where NRW has already considered the desirability of the proposed works.
10.4 Mae categori (d) wedi'i gynnwys er mwyn osgoi'r angen am broses awdurdodi ychwanegol mewn achos lle mae CNC eisoes wedi ystyried dymunoldeb y gwaith arfaethedig.