Spain's Migrant Regularization Sparks Controversy
Online applications open April 16 for regularization.
Prime Minister Pedro Sánchez calls it 'an act of justice'.
Applicants must have arrived before Jan 1 and a clean criminal record.
Applications available at 371 post offices and 60 social security offices.
Opposition parties condemn the plan as 'outrage' and 'treason'.
Government estimates 500,000 eligible applicants, but analysts suggest 1.35 million.
Council of State raises concerns about criminal background checks.
2 days ago