Abstract: A multi-function binding system configured for use on a sliding board comprising: (a) a binding operable with a boot assembly, the binding comprising a support surface and toe and heel pieces extending therefrom; (b) a base assembly configured to be rotatably and removably secured to a deck of a sliding board and to releasably couple the binding during use of the sliding board, the base assembly comprising: (i) a support disc configured to be removably coupled to the deck of the sliding board and to secure the base assembly to the sliding board; (ii) a deck plate rotatable about the support disc and configured to be positioned adjacent the deck; (iii) a bonnet also rotatable about the support disc and configured to receive and engage the binding, the bonnet operable with the deck plate to support one or more components of the base assembly; (iv) adjustment means for facilitating the rotational adjustment of the bonnet and the deck plate about the support disc and with respect to the sliding board, thereby fac