A student plagiarises if he or she gives the impression that the ideas, words or work of another person are the ideas, words or work of the student.
Plagiarism includes:
copying any material from books, journals study notes or tapes, the web, the work of other students, or any other source without indicating this by quotation marks or by indentation, italics or spacing and without acknowledging that source by footnote or citation;
rephrasing ideas from books, journals, study notes or tapes, the web, the work of other students, or any other source without acknowledging the source of those ideas by footnotes or citations; or
unauthorised collaboration with other students that goes beyond the discussion of general strategies or other general advice.
thats the newy uni guidelines and by the looks of it i should be ok. it says nothing about re-using your own work, only the work of other students