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; (b) a base assembly rotatably and removably secured to a deck of a sliding board and to releasably couple the binding, the base assembly comprising: (i) a support disc 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; (iv) an adjustment mechanism for rotational adjustment of the bonnet and the deck plate about the support disc with respect to the sliding board; (v) a coupler mechanism configured to releasably couple the binding to the base assembly, and therefore the boot system to the sliding board, thereby securing a user thereto; and (vi) a release for actuating