Is it true that there is no longer any requirement to label gasoline
contaminated with alcohol?

Worse.
I read that, starting in 2007, in some places, California and some
Canadian Provinces included, it is regulated that all gasoline sold must
contain at least 5% alcohol/ethanol.

Tony
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Tony Roberts
PP-ASEL
VFR OTT
Night
Cessna 172H C-GICE