For purposes of this Article, the class hour unit for graded and ungraded classes is defined as not less than 50 consecutive minutes exclusive of passing time. In block scheduling of more than one class hour only one contact hour may be counted in each clock hour of 60 minutes, except that a fractional part of class hour beyond the last full clock hour may be counted from and including the 51st minute of the last full clock hour providing there is no class break in the last full clock or the partial class hour. The divisor for this fractional part of a class hour shall be 50.

The Chancellor's Office may, by rule and regulation, make any and all other provisions necessary to carry out the provisions of this Article.