How To Write a Rule

[jumbojimbo]

Here is one of my favorites from the ITCS.

1. why are some pieces of this directly in the D. section and others split out into bullets 1, 2, and 3?

2. how are 1,2 and 3 sub-subjects of section d at all? they are sort of related to emissions but not related to the first line of d.

3. Bullets 2 and 3 are not completely inclusive of all situations. where does a vehicle fit which is not registered for the street but does not have polution control removed? Not covered by 2 and not covered by 3, so what kind of fuel is permitted/required? edit: the lesson is to avoid negative logic, especially when using "and".

4. Does bullet 3 remove the limits of bullet 2? IE, since my car is registered for the street (bullet 3) does that mean i can use pump gas meeting the workshop manual octane rating and I'm exempt from rule 9.3 Fuel?

d. Exhaust emission control air pumps, associated lines, nozzles, and electrical/mechanical EGR devices may be removed. If such items are not removed, they shall not be modified in any way. If EGR devices/nozzles are removed from a cylinder head or manifold, any holes remaining shall be completely plugged. Water to an intake manifold may be blocked or removed as part of the emission system.

1. If fitted, catalytic converter(s) may be removed.

2. Those vehicles which have emission control devices removed and which are not registered and licensed for street operation may use any gasoline meeting the requirements of GCR Section 9.3 Fuel.

3. Those vehicles registered and licensed for street use shall use the fuel specified by the workshop/owner’s manual.