Some coal-firing power plants that pollute in excess of regulatory limits may simply be exempt from the applicable regulation, having, for example, been grandfathered in when the regulation was enacted or having been granted a specific exemption based on other considerations.
(A) having, for example, been grandfathered in when the regulation was enacted or having been
(B) having, for example, regulation that grandfathered them in when it was enacted, or being
(C) as, for example, having regulation that grandfathered them in when it was enacted, or being
(D) when they have, for example, been grandfathered in when the regulation was enacted, or were
(E) for example, when they were grandfathered in when the regulation was enacted, or been
(A) having, for example, been grandfathered in when the regulation was enacted or having been
(B) having, for example, regulation that grandfathered them in when it was enacted, or being
(C) as, for example, having regulation that grandfathered them in when it was enacted, or being
(D) when they have, for example, been grandfathered in when the regulation was enacted, or were
(E) for example, when they were grandfathered in when the regulation was enacted, or been
