149.If a professional manager is used, a fee will be due, probably at regular intervals. The amount is a matter for negotiation with the manager. Section 31 apportions that amount equally among owners in the community (subject to different provision in the titles). The second half of section 31 provides rules for apportioning liability between co-owners. The manager is entitled to payment in full from a co-owner. The co-owners are only liable in a question amongst themselves for a share equal to their share of ownership of the unit.