additional measures necessary to achieve those objectives are established subject to the application of regulations 15 to 19 of the 2017 Regulations.
y bydd mesurau ychwanegol, sy’n angenrheidiol i gyflawni’r amcanion hynny, yn cael eu pennu, yn amodol ar gymhwyso rheoliadau 15 i 19 Rheoliadau 2017.