Permission is required if you plan to extend or alter the roof space more than specified limits and conditions: 1  Volume increase of 40 cubic metres for terraced houses or 50 cubic metres for detached & semi-detached houses. ( 2 2-3 bedroom houses generally will be OK for dormers). Volume increase of 40 cubic metres for terraced houses or 50 cubic metres for detached & semi-detached houses. ( 2 2-3 bedroom houses generally will be OK for dormers). 3  No extension beyond the plane of the existing roof slope of the principal elevation that fronts the highway (i.e. no dormer to face the street).
The rules haven't changed in a few decades, but the customs have. In both houses of Congress, you still need a majority (50%+1) to pass a bill. In the House of Representatives, that's the only consideration. In the Senate, the rules are a bit more complex. If the bill makes it to a vote, it needs only 51 votes. But you need to debate before it gets to a vote.
To override a presidential veto, a supermajority vote of two-thirds of the <strong>voting</strong> members of each house, the House of Representatives and the Senate, is required. There are 435 voting representatives in the House. If all these representatives voted, it would take 2/3rds of 435 = 290 votes to override a veto. In the Senate, it also takes a 2/3rds of 100 members = 67 votes to override a veto.