Concerning the office of the vicars of the choir. Divine service is to be celebrated for the praise of the Holy Trinity, the Blessed Virgin Mary, and St Machar. The first Mass in the morning is to be that of the Blessed Virgin.

De officio vicariorum chori . Vt autem omnibus imperpetuum temporibus in prenominata ecclesia cathedrali ad laudem Sancte Trinitatis et beate Virginis Marie et beati Machorij diuinum seruicium augeatur statuimus {. . .} Primam missam mane de beata Virgine dicendam constituimus {. . .}