EU: SCHENGEN BORDER CONTROLS: European Parliament: Amendments 24 - 93: Draft report Carlos Coelho: Proposal for a regulation of the European Parliament and of the Council on the establishment of an evaluation mechanism to verify
EU: SCHENGEN BORDER CONTROLS: European Parliament: Amendments 24 – 93: Draft report Carlos Coelho: Proposal for a regulation of the European Parliament and of the Council on the establishment of an evaluation mechanism to verify application of the Schengen acquis (pdf): The various proposals for art. 13b and 13c (amendments 84-87) provide for different suggested mechanisms for re-imposing internal border controls.
See also: European Parliament: Plenary session debate, 10 May 2011: Migration flows and asylum and their impact on Schengen (debate) (pdf) and EU: Members states reluctant to let Brussels get a look in on border controls (euobserver, link)