Section 11. Disqualification. —

The following shall be disqualified from registering:

1. Any person who has been sentenced by final judgment to suffer imprisonment of not less than one (1) year, such disability not having been removed by plenary pardon or amnesty: Provided, however, That any person disqualified to vote under this paragraph shall automatically reacquire the right to vote upon expiration of five (5) years after service of sentence.

2. Any person who has been adjudged by final judgment by a competent court or tribunal of having committed any crime involving disloyalty to the duty constituted government such as rebellion sedition, violation of the firearms laws or any crime against national security, unless restored to his full civil and political rights in accordance with law: Provided, That he shall automatically reacquire the right to vote upon expiration of five (5) years after service of sentence; and

3. Insane or incompetent persons declared as such by competent authority unless subsequently declared by proper authority that such person is no longer insane or incompetent.