LOL ;D
Correct me if I'm wrong but I don't think the dress regs have been officially updated yet for the wearing of the executive curl. However, according to the executive curl's Interim Policy Guidance document, the executive curl slip-on is authorized for wear with the temperate woodland version of the CADPAT, but not the other versions (arid etc.). Unfortunately it doesn't detail whether it is the left or right slip-on that is to be worn on the CADPAT.
"e. Slip-ons CADPAT Lightweight Combat Clothing. Distinct navy slip-on identifiers are approved for wear with CADPAT Lightweight Combat Clothing (LWCC) Temperate Woodland (TW) in Canada dependent on the operational context of the unit – i.e. in non-tactical situations as deemed by the operational commander in accordance with reference D. The current navy slip-on identifier is black thread rank insignia on Canadian Average Green. The new navy identifier slip-on for CADPAT LWCC (TW) will be modified to incorporate the executive curl and it will be a unisex design as per the service dress/NCD slip-on. For tactical situations, the slip-on will be the CADPAT TW standard slip-on with no navy identifier (no executive curl). Authorization on overseas operations will be at the discretion of the Theatre Commander based on the operational situation. All other CADPAT designs (i.e. Arid Region, Arctic) will use the appropriate CADPAT design slip-on, again with no navy identifier."