(1) The partnership takes effect in relation to third parties upon its entry into the partnership register.
(2) The provisions of section 124 (1) and (2) and section 124 (4), (5) and (6) of the Commercial Code apply accordingly to the representation of the partnership.
(3) Section 125 (1) sentence 1 and section 125 (2) of the Commercial Code apply accordingly to the content of letters of the partnership, with the proviso that in the case of a partnership with limited professional liability, the additional name within the meaning of section 8 (4) sentence 3 which has been selected by this partnership is also to be stated.