New Delhi, March 21: The Congress on Wednesday said it was against dilution of any provisions in the SC/ST Act and asked the Modi government to amend law or file a review petition in view of the Supreme Court order that said arrest of an accused under the Act is not mandatory. A day after the court judgment that recourse to coercive action under the Scheduled Castes and the Scheduled Tribes (Prevention of Atrocities) Act would be only after prelimiry inquiry and sanction by the competent authority, the Congress accused the government of not fighting the case properly.