CBM_HOUSE_ALLOW_CONSTRUCTION        =  0, ///< decide whether the house can be built on a given tile

	CBM_HOUSE_ANIMATION_NEXT_FRAME      =  1, ///< decides next animation frame

	CBM_HOUSE_ANIMATION_START_STOP      =  2, ///< periodically start/stop the animation

	CBM_HOUSE_CONSTRUCTION_STATE_CHANGE =  3, ///< change animation when construction state changes

	CBM_HOUSE_COLOUR                    =  4, ///< decide the color of the building

	CBM_HOUSE_CARGO_ACCEPTANCE          =  5, ///< decides amount of cargo acceptance

	CBM_HOUSE_ANIMATION_SPEED           =  6, ///< decides animation speed

	CBM_HOUSE_DESTRUCTION               =  7, ///< trigger destruction of building

	CBM_HOUSE_ACCEPT_CARGO              =  8, ///< decides accepted types

	CBM_HOUSE_PRODUCE_CARGO             =  9, ///< custom cargo production

	CBM_HOUSE_DENY_DESTRUCTION          = 10, ///< conditional protection