These are the 18 "states": Arkansas, Arizona, Connecticut, Florida, Idaho, Indiana, Iowa, Kansas, Louisiana, Maryland, North Dakota, Oklahoma, Texas, Utah, Virginia, Wisconsin, Washington, and the District of Columbia, according to the EPA. (17+D.C.)

134a fittings are required plus appropriate labeling.

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The Golden Rule

1984 300SD (bought new, sold it in 1988, bought it back 13 yrs. later)