We are talking about two separate issues here. There is the purification of the sacred vessels, and the reposing of the Blessed Sacrament. Although an indult had been given so that lay persons could purify the sacred vessels, Pope John Paul was very ill and most likely unable the extend that indult. Insofar as reposing the Blessed Sacrament, there is no such restriction that I have found, and extraordinary ministers are permitted to do this. Regarding purification of vessels:
*"Although the General Instruction of the Roman Missal (GIRM) states that the ritual purification of sacred vessels used at Mass must be done by a priest or deacon, or a formally instituted acolyte, the US Conference of Catholic Bishops (USCCB) had obtained special permission (or “indult”) to allow non-ordained “extraordinary ministers” to perform that role. The indult was granted by the Congregation for Divine Worship on March 22, 2002, for a period of three years. The official letter granting the indult said, in part,
…for grave pastoral reasons, the faculty may be given by the diocesan bishop to the priest celebrant to use the assistance, when necessary, even of extraordinary ministers in the cleansing of sacred vessels after the distribution of Communion has been completed in the celebration of Mass. This faculty is conceded for a period of three years as a dispensation from the norm of the Institutio Generalis, editio typica tertia of the Roman Missal.
When the indult expired in March 2005, the USCCB requested an extension; however, at that time Pope John Paul II was near death, and the election of Pope Benedict XVI took place less than a month later, and no action was taken on the expired indult. In March, the USCCB repeated the request. Cardinal Arinze’s letter explained that he had consulted the Holy Father in June, and that the request was denied."
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Our parish follows this exactly. Although our priest always purifies the vessels, we as extraordinary ministers are permitted to clean the vessels. We are also permitted to place the Blessed Sacrament in the Tabernacle.