Article 22

1. [Principle] Subject to paragraph 2, a Contracting Party shall apply the provisions of this Treaty and the Regulations, other than Articles 5 and 6(1) and (2) and related Regulations, to applications which are pending, and to patents which are in force, on the date on which this Treaty binds that Contracting Party under Article 21.

2. [Procedures] No Contracting Party shall be obliged to apply the provisions of this Treaty and the Regulations to any procedure in proceedings with respect to applications and patents referred to in paragraph 1, if such procedure commenced before the date on which this Treaty binds that Contracting Party under Article 21.