Laws, Regulations & Annotations PTLG Table of Contents > Property Tax Annotations > U > 845.0000 UNIT Property Taxes Law Guide – Revision 2017 Property Tax Annotations A B C D E F G H I L M N O P R S T U V W U 845.0000 UNIT View entire section 845.0001 Appraisal Unit. 845.0002 Appraisal Unit. 845.0010 Cable Television Appraisal Unit—Declines in Value.