(a) If the declaration expressly so permits, a unit may be subdivided into two or more units. Subject to the provisions of the declaration and other provisions of law, upon application of a unit owner to subdivide a unit, the association shall prepare, execute, and record an amendment to the declaration, including the plats and plans, subdividing that unit.

(b) The amendment to the declaration must be executed by the owner of the unit to be subdivided, assign an identifying number to each unit created, and reallocate the allocated interests formerly allocated to the subdivided unit to the new units in any reasonable manner prescribed by the owner of the subdivided unit.