[] 1 yes
[] 2 don't know
[] 3 not a contributor

1 - Yes - for persons who contribute to a federal, state or municipal social security institute, such as IAPAS, INPS, INAMPS, IPASE, SASSE, etc., including members of the police or auxiliary military forces);
2 - Does not know - for persons who do not know whether or not they contribute to a public social security institute; or
3 - Is not - for persons who are not contributors to any social security institute. Also mark IS NOT for persons who are only contributors to private social security and for military members of the army, navy or air force.