The use of measuring devices is acceptable as long as it does not measure slope.
Missouri, Illinois (Shawn Kelly) email
Tennessee (Kallie Harrison) email
Arkansas (Dave Wells) email
Iowa (Joe Weinbauer) email
Indiana (John David) email
Kansas (Chuck Schasteen) email
Oklahoma, Kentucky (Stan Thompson) email
Georgia, Michigan, NC, Maryland
(Steve Wendling) email
Hawaii
All other states (Jim McLaughlin) email