New evidence will, therefore, be admitted at the appeal stage only if it were not known, or could not reasonably have been acquired, before the proposal was considered by the VOA.
Felly, dim ond os nad oedd yn hysbys, neu na ellid bod wedi'i chael yn rhesymol, cyn i'r cynnig gael ei ystyried gan yr Asiantaeth y caiff tystiolaeth newydd ei derbyn yn ystod y cam apelio.