When a foiling vessel is low-riding (sailing hull down), the sailor will bounce, pump, ooch and rock in order to get up on the foil.  To negate possible rule violation, foiling regattas often use Appendix P which permits these actions (RRS P5).  To simplify this permission concept section our foiling SIs will state:
1.3  When low-riding, pumping, rocking, and ooching are permitted (Experimental proposed rule change of RRS 42.3).