Owners or operators of units or facilities must hold sulfur dioxide allowances, nitrogen oxides allowances, or mercury allowances at least equal to the emissions of sulfur dioxide, nitrogen oxides, or mercury respectively.
Operators of facilities always meet their allowances for sulfur dioxide and mercury.
mnli hypothesis: Operators of facilities always meet their allowances for sulfur dioxide and mercury. premise: Owners or operators of units or facilities must hold sulfur dioxide allowances, nitrogen oxides allowances, or mercury allowances at least equal to the emissions of sulfur dioxide, nitrogen oxides, or mercury respectively.