[ed_balls]

It's quite hard, it would be a mixture or references, conditions, size of all legislation.

>The complexity of options trading regulation should not be subject to the same complexity threshold as (eg) public intoxication laws

Why not? The point is to make it a bit harder to pass more complex laws, not stopping it. Your parliament has 500 seats. You need 251 votes to pass new complex law. For laws that simplify complexity you need half of the present MPs e.g. 400 are in, so you need 201 votes.