The board of commissioners may divide the lands in the Lafourche Basin Levee and Drainage District into classes or sub-drainage districts, and tax, locally assess, and impose forced contributions and acreage taxes on the lands in the classes or sub-drainage districts in proportion to the benefits derived by the land from the drainage.  All lands in the same class or sub-drainage districts shall pay an equal tax, local assessment, enforced contribution or acreage taxes.