So, the national security exemption may be necessary to protect such economic infrastructure and activities but not to secure an economic advantage for the authority.
Felly, efallai y bydd yr esemptiad ar gyfer diogelwch gwladol yn angenrheidiol i ddiogelu seilwaith a gweithgareddau o’r fath ond nid i ddiogelu mantais economaidd i’r awdurdod.