Law 3.5.b http://laws.worldrugby.org/?law=3 requires that with 15 or less, there are three players adequately trained for the front row.
MAC requires that a full side be prepared at the beginning of a league match. If there is not a front row to begin the match, the match will be counted as a Match forfeit. The teams may continue to play with uncontested scrums.
Effective: 10/31/2017