The board shall determine what amount or part of every expense shall be charged as an assessment and the tracts upon which the same shall be levied, and as often as the board deems it expedient, it shall require all of the several tracts chargeable therewith respectively to be reported by the secretary to the engineer for assessment.
Source: L. 69: p. 799, � 148. C.R.S. 1963: � 89-21-148.