Can any law providing for the acquisition of any estate or of any rights therein be considered unconstitutional under Article 13, according to Article 31B(4)?
No, any law providing for the acquisition of any estate or of any rights therein cannot be considered unconstitutional under Article 13, according to Article 31B(4). The saving clause in Article 31B allows certain laws to operate notwithstanding their violation of fundamental rights, including those related to property acquisition.