He said the Prevention of Communal Violence (Access to Justice and Reparations) Bill, 2014 does not either directly or indirectly seek to legislate on public order, police and public services of the state. Therefore, it is not in violation of the federal structure.
He said the Bill, however, enables the National Human Rights Commission to investigate what are defined as 'scheduled' offences only and only if state governments give their concurrence. "In any event, the central government has no role to play in such investigations," he wrote on his website.
Sibal said India has witnessed the targeting of sections of society professing one religion or another.
"The country has, he said, witnessed state governments unwilling to investigate offences committed during the course of such targeting.
"In fact, many courts, including the Supreme Court, have been constrained to comment that state investigating agencies have not only been laggard but have willingly misdirected their investigations to benefit the real accused.
"In this state of affairs, in certain circumstances, with the concurrence of the state, an investigation may be handed over to National Human Rights Commission. How such a Bill transgresses the exclusive legislative competence of the state Legislature is beyond comprehension," he said.
Attacking Arun Jaitley, he said the objection of the Leader of Opposition in the Rajya Sabha that Parliament lacks legislative competence to introduce Prevention of Communal Violence (Access to Justice and Reparations) Bill, 2014 is without substance.
"If the logic of the Leader of the Opposition were to be accepted, then the Delhi Special Police Establishment Act, 1946 is also unconstitutional since it permits investigation of offences and classes of offences by the CBI with the consent of the state government," he said.
He said the bill also deals with compensation and rehabilitation of victims of 'scheduled' offences.
"This in no way interferes with law and order or public order. It merely seeks to rebuild the lives of those destroyed by acts of wilful violence against them. Partisan politics should not stand in the way of such legislation," Sibal wrote.
His remarks on the bill came after Deputy Chairman P J Kurien had on Wednesday ruled that the Prevention of Communal Violence (Access to Justice and Reparations) Bill, 2014 stands deferred in view of the "mood of the House" after its introduction was opposed by BJP, CPI-M, AIADMK, DMK and SP.