A domestic life company may invest in or otherwise acquire and hold a limited partnership interest in any limited partnership formed pursuant to chapter one hundred and nine or pursuant to the laws of any state or of the United States.
No limited partnership interest shall be acquired under this section if the cost thereof would exceed two per cent of the assets of such company nor if such cost, plus the book value on the date of such acquisition of all limited partnership interests held under this section, would exceed ten per cent of such assets.