Chinese Constitution in 1969 - Page 7
Chapter II -- Membership (continued)

Article 4

When Party members violate Party discipline, the Party organizations at the levels concerned shall within their functions and powers and on the merits of each case, take appropriate disciplinary measures -- warning, serious warning, removal from posts in the Party, placing on probation within the Party, or expulsion from the Party.

The period for which a Party member is placed on probation shall not exceed two years. During this period, he has no right to vote or elect or be elected.
A Party member who becomes politically apathetic and makes no change despite education should be persuaded to withdraw from the Party.

When a Party member asks to withdraw from the Party, the Party branch concerned shall, with the approval of its general membership meeting, remove his name from the Party rolls and report the matter to the next higher Party committee for the record. When necessary, this should be made public to the masses outside the Party.

Proven renegades, enemy agents, absolutely unrepentant persons in power taking the capital road, degenerates and alien-class elements must be cleared out of the Party and not be re-admitted.