Dominican Tertiaries (Lay Dominicans) are reminded that a plenary indulgence may be acquired, provided the usual conditions (confession, Communion and prayer for the intentions of the Supreme Pontiff) are properly fulfilled, who make or renew, at least privately, the promise to faithfully observe the statutes of the Third Order (Lay Fraternity of St. Dominic) on the upcoming Feast of St. Catherine of Siena on April 29 (new calendar) or April 30 (Dominican Rite calendar).
The complete list of days when the plenary indulgence may be obtained, can be found here, at the Australian Province Website.