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What is the maximum permitted shank length of a standard western bit?
8 1/2 inches.
From where is shank length measured?
From the inside bottom of the top ring to the point of pull.
May shanks be fixed or loose?
Yes.
What diameter range is allowed for western bit mouthpiece bars?
5/16 inch to 3/4 inch.
Where is mouthpiece diameter measured?
1 inch from the cheek.
How far may nothing protrude below the mouthpiece bar?
More than 1/8 inch is not allowed.
What is the maximum port height?
3 1/2 inches.
Are rollers and covers permitted?
Yes.
Are broken mouthpieces permitted?
Yes.
Are half-breeds and spades considered standard?
Yes.
May spade bits have wire wrapped around the spacer bar?
Yes.
Are slip or gag bits acceptable?
No.
Are donut or flat polo mouthpieces acceptable?
No.
How many points of pull does a standard western bit have?
One.
When a curb bit is used, what additional equipment is required?
A curb strap or curb chain.
What is the minimum width of a curb strap or curb chain?
1/2 inch.
How must the curb strap or chain lie against the jaw?
Flat.
Can the curb strap or chain contain barbs, wire, or twists?
No.