Article 67

the rate of the benefit shall be determined according to a prescribed scale or a scale fixed by the competent public authority in conformity with prescribed rules;

such rate may be reduced only to the extent by which the other means of the family of the beneficiary exceed prescribed substantial amounts or substantial amounts fixed by the competent public authority in conformity with prescribed rules;

the total of the benefit and any other means, after deduction of the substantial amounts referred to in subparagraph (b), shall be sufficient to maintain the family of the beneficiary in health and decency, and shall be not less than the corresponding benefit calculated in accordance with the requirements of Article 66;

the provisions of subparagraph (c) shall be deemed to be satisfied if the total amount of benefits paid under the Part concerned exceeds by at least 30 per cent. the total amount of benefits which would be obtained by applying the provisions of Article 66 and the provisions of:

Article 15(b) for Part III;

Article 27(b) for Part V;

Article 55(b) for Part IX;

Article 61(b) for Part X.