A variance or a permit is granted in person, and does not attach to the realty to which it relates. A variance cannot be transferred without prior notification to the commission. If a transfer of ownership of a source covered by a variance is contemplated by the holder of the variance, and the source and characteristics of the emissions will remain unchanged, upon notification, the executive director shall issue an endorsement to the variance reflecting the name of the new owner. Continuation of emissions by the new owner without prior notification to the commission makes the variance subject to forfeiture.