BB producers will intepret the rules exactly as they choose. They will do this on the basis of which interpretation they think will give them the best ratings in the future. However with my lawyers hat on, the publication of clarification of alternative scenarios on the website ties their hands.
http://www.channel4.com/bigbrother/b...afef70/view.c4
EITHER only the 5 newbies OR Noirin, Halfwit (and any other HM that ties with them)