The management company may not, on behalf of a fund, carry out any transactions other than forward or spot purchases or sales of its assets which are not traded on a financial instruments market within the meaning of I of article L. 214-28, within the limits set by this sub-section, nor may it sell or buy equity or debt securities held for more than twelve months to an affiliated undertaking in respect of the same assets. Any undertaking controlled exclusively or jointly by the management company within the meaning of article L. 233-16 of the Commercial Code, any undertaking controlling the management company exclusively or jointly within the meaning of the same article L. 233-16, any subsidiary of the same parent company, as well as any company with which the management company has corporate officers or directors in common and which performs investment management functions on behalf of the company, or management functions within the meaning of article L. 321-1 , paragraph 4 and article L. 214-24-35, or advisory functions within the meaning of article L. 321-2, paragraph 4.