§ 76. Limited return on capital and debentures. No shareholder, partner or beneficiary of a trust having an interest vested in possession in any housing company formed hereunder shall receive any distribution on capital in any one year in excess of six per centum per annum except that when in any preceding year distributions in the amount prescribed in the certificate shall not have been paid on the said capital, the shareholders, partners or beneficiaries, as the case may be, may be paid such deficiency without interest out of any surplus earned in any succeeding years. This provision shall likewise be applicable to income debenture certificates and interest thereon at the rate specified in such certificates shall be cumulative.