Actually, I think this is a great example of how you can get ahead of yourself regulating - I'm assuming you think the lesson should be that all gas stations should have generators? In some communities the gas station probably is a life and death concern, but in most it isn't - so requiring all gas station owners to invest in and maintain a generator is an expense (passed on to consumers, like all regulation) with a very low return. And we haven't even considered unintended consequences: When gas stations are critical infrastructure, having a generator in your garage (but no fuel stored) makes more sense, so you risk overloading the gasoline supply by shifting all energy consumption to it, thus causing it to become unavailable anyway.

Also, I'm not sure why making Jacques' gas station the preferred supplier would be a meaningful expected market response. He already stated that they turned over a month's fuel in two days, that should have made him a pretty good profit.