 The Second Modification and Supplementation Law (1970) increased the allowance for the third child from DM 50 to DM 60, raised the income-limit for the second child allowance from DM 7,800 to DM 13,200; subsequently increased to DM 15,000 by the third modification law (December 1971), DM 16,800 by the fourth modification law (November 1973), and to DM 18,360 by the fifth modification law (December 1973).A flexible retirement age after 62 years was introduced (1972) for invalids and handicapped persons, and social assistance was extended to those who previously had to be helped by their relatives.From 1971, special subventions were provided to enable young farmers to quit farming "and facilitate their entry into the non-agricultural pension system by means of back payments".