In simple terms, a wall that divides two properties in separate ownership. A Party Wall may be built astride the boundary, and therefore in the joint ownership of two or more neighbours, this includes horizontal and vertical boundaries within multiple occupancy structures (Type 'A'); or it may be built solely on the land of one owner but provides a boundary between them (Type 'B'). It is worthy of note that the ‘etc’ element of the Act deals with structures in close proximity to each other which are not specifically party walls. This means that certain works, which are considered likely to affect the neighbouring structure, are deemed to be 'notifiable' under the Act and the Building Owner is required to serve notice upon the adjoining owner(s) prior to commencing works on site The Act details the specific notice periods applicable in each situation. If a dispute under the Act arises the parties must either each appoint their own Surveyor, or concur in the appointment of an Agreed Surveyor in accordance with Section 10 of the Act. The purpose of this appointment is the resolution of the dispute by way of a Party Wall Award.