This will be the situation where only pre-selected suppliers are invited to tender and a tendering period is agreed between the contracting authority and those pre-selected suppliers.
Dyma’r sefyllfa os mai dim ond cyflenwyr a ddetholwyd ymlaen llaw sy’n cael gwahoddiad i dendro a bod yr awdurdod contractio a’r cyflenwyr hynny a ddetholwyd ymlaen llaw yn cytuno ar gyfnod tendro.