Artikel 61

1. Where entitlement to invalidity benefit is conditional under a Party's legislation, upon completion of a qualifying period, that period may not be longer than five years completed in accordance with prescribed rules prior to occurrence of the contingency.
2. Where the benefits calculated in accordance with paragraphs 5 to 7 of Article 60 are guaranteed to all protected persons who have effectively completed, in accordance with prescribed rules and at a prescribed age, a qualifying period of five years or less, qualifying periods longer, depending on age, than those specified in paragraph 1 of Article 61 may be required after a prescribed age.