I've previously used priceusa.com.au to buy some cutlery from US Amazon - so funny that some things can't be shipped here, but they were very helpful.

Yes you can. But there are certain standards of construction to be met such as incasing the sewer line in concrete. Depends on where its located, who else near by has done the same thing, etc. which can determine the action to be taken. Councils don't generally own the sewer lines (amongst numerous other reasons), hence they can't comment. Design, building & construction can be a complicated process so don't expect all the council employee's to know everything and make suggestions....in particular in this day and age of litigation......

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This explanation may help, Source: https://www.renovatorstore.com.au/blog/lighting-and-power-in-your-bathroom-the-simple-rules-to-be-safe/ REQUIREMENTS Zone 0: Inside the bath or shower. Any Lighting used here must have a minimum rating of IP67 (protected against immersion in water) Zone 1: Above the bath or shower to a height of 2.25m. A minimum rating of IP44 is required Zone 2: The area stretching to 0.6m outside the bath or shower and above the bath or shower if over 2.25m. An IP rating of at least IP44 is required Outside Zone: Anywhere outside zones 0, 1 & 2. Where water jets are not to be used for cleaning purposes, the general rules of BS7671 apply In addition to the above, if there is a likelihood of water jets being used for cleaning purpose in zones 1 and 2 a fitting rated a minimum IP65 must be used. Now that this has been explained, always make sure to purchase bathroom lighting according to these standards to make sure that your bathroom is always safe. You should also have this principle applied when you purchase other electrical devices such as heated towel rails, or a guide to where you'd put sockets in your bath for razors and other devices. This may also fix the common misconception that LED lights are not rated for bathrooms. Typical LED lights have an IP rating of IP66 which is more than the needed IP rating standard that bathrooms should have. - Not to mention you'd be saving a whole lot from energy bills in the long run.