This is the original version (as it was originally made).
3. Ni chaiff tanc elifiant dal llai nag—
(a)yn achos seilo sy’n dal llai na 1,500 o fetrau ciwbig, 20 litr ar gyfer pob metr ciwbig o’r hyn y mae’r seilo yn ei ddal, a
(b)yn achos seilo sy’n dal 1,500 o fetrau ciwbig neu fwy, 30 o fetrau ciwbig ac yn ychwanegol 6.7 litr ar gyfer pob metr ciwbig o’r hyn y mae’r seilo yn ei ddal uwchlaw 1,500 o fetrau ciwbig.
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