Are there any limitations on what can be proposed in one of the houses? For example in Australia our upper house (senate) can't adjust or propose bills to do with money.
There are the parliament acts which restrict the length of the delay the HoL can inflict (including to just 1 month for money bills). They also cannot amend money bills.
There is however the Salisbury convention which is that the HoL shouldn't block legislation that was a manifesto commitment of the governing party. That doesn't meant they can't amend it at all, but they can't substantively change it. It's also just a convention, not a rule.
