The planning commission may recommend, and the board of supervisors may impose, conditions to the zoning reclassification of property where it is deemed proper to do so, and where the applicant for rezoning consents, so as not to create problems inimical to the public health, safety and general welfare of the county. Such conditions shall run with the land for however long the property remains in the zoning district involved. (Prior gen. code § 8-103.6.5)