I'm not sure what you're asking
If you're wondering whether the installation is legal, the answer is yes. Federal marine sanitation laws do prohibit the discharge of untreated waste (directly from the toilet or dumping a tank) within 3 miles of the nearest point on the US coastline...but once you're more than 3 miles out to sea, you can flush directly overboard and/or dump a tank.If you're wondering whether there are any standards or "building codes" and whether your installation meets them...the answer is yes and no. Except for CG regs, there are no compulsory "codes" as there are for buildings on land, but there established standards--ABYC, UL, NFPA--that all reputable builders voluntarily follow and so do most dealers. Do you have a problem with the dealer's installation? If so, what specifically?