The objective of the Sharda Act of 1930 was to discourage the solemnization of marriages of boys and girls respectively under:

The Child Marriage Restraint Act, popularly known as the Sarda Act after its sponsor Harbilas Sarda, was passed in 1929 and became effective on April 1, 1930 [c1, t4]. The primary objective of this legislation was to discourage the solemnization of child marriages by establishing minimum age requirements for marriage across all communities in British India [t2, t4]. According to the Act, the minimum marriageable age was fixed at 18 years for boys and 14 years for girls [c1, t4, t6]. This was a significant milestone in social reform, as it was the first such issue championed by organized women's groups in India [t4]. It is important to distinguish this from the 1978 amendment, which later raised these limits to 21 years for boys and 18 years for girls [c1, t4].

Sources

1. [1] Rajiv Ahir. A Brief History of Modern India (2019 ed.). SPECTRUM. > Chapter 8: Socio-Religious Reform Movements: General Features > Direction of Social Reform > p. 197
2. [2] https://en.wikipedia.org/wiki/Child_Marriage_Restraint_Act
3. [3] https://www.pib.gov.in/newsite/erelcontent.aspx?relid=100741