Effectiveness and costs raisedpublished at 10:50 British Summer Time 28 March 2017
SNP MSP Stewart Stevenson says the railway operating companies said that effectiveness and costs is what they would take most interest in.
Mr Stevenson asks about costs and whether these will be borne by Police Scotland.
Transport Minister Humza Yousaf says rail companies have said that discussions with the government on this have been constructive.
Mr Yousaf says when there have been other changes to legislation Police Scotland have had to cover it within their current budgets.