(1) A limitation on the scope of the general commercial power of representation is ineffective in relation to third parties.
(2) This applies especially to a limitation whereby the general commercial power of representation is to be exercised only for particular transactions or particular kinds of transactions or only under certain circumstances or for a certain period of time or at specific places.
(3) A limitation of the general commercial power of representation to the operation of one of several offices of the business owner will be effective in relation to third parties only if the offices are operated under different business names. The business names are different from one another within the meaning of this provision if, for a branch office, an addition is appended to its business name to indicate that it is the business name of the branch office.