Well, I've been reading this thread and simultaneously shaking my head at what you, in N.A., have to put up with or deal with when it comes to government oversight and inspections.
Honestly? Constant mandated inspections and pump-outs!? It's a bloody, legislated, cash-grab.
I have a simple 2-chamber, gravity fed, concrete septic tank that feeds to a simple french field (separate grey water field). The Shire Council probably signed off on the system back when the house was built around '94. I bought it in '98 and had tenants here until I retired here in late '12. Three months ago, for the first time, I had the tank pumped due to heavy rain that caused a wee bit of back-up. When the truck came a few days later and the lid was opened, they said everything was fine and healthy, the tank wasn't actually full but we're here so we'll pump it.
"See you in another 20 years."
What are you blokes putting up with?!?