For those who think that the rite has changed, or the washing of anyone's feet is permitted, the Congregation of Divine Worship issued an interpretation in 2008, in response to an inquiry. The letter is given above, the text, which is a little hard to read in the image is given here with my emphases:
The Congregation for Divine Worship and the Discipline of Sacraments gratefully acknowledges your letter dated 12 April 2008, in which you enquire about the rubrics for the washing of feet during the Evening Mass of the Lord’s Supper on Maundy Thursday.
According to the Missale Romanum (tertia edito typica 2002), Feria V in Cena Domini, Ad Missam vespertinam, no. 11, the washing of feet is reserved to “chosen men” (viri selecti), that is, male persons. This is also stated in the Caeremoniale Episcoporum (editio typica 1984, reimpressio 1995), no 301. This Dicastery considers this legislation clear and wishes to add nothing further.
Should your problems persist, the Congregation would remind you that you write again to the Diocesan bishop who is the moderator, promoter and guardian of the liturgical life of the diocese (cf. canon 835 #1). He would be the appropriate person to contact.
With every prayerful good wish, I am
Sincerely yours in Christ
Fr. Anthony Ward, S.M.