The following are referential words:(a) "of this Act" ;(b) "to this Act" ;(c) "of these regulations" ;(d) "to these regulations" ;(e) "of this Schedule" ;(f) "of this Chapter" ;(g) "of this Part" ;(h) "of this Division" ;(i) "of this Subdivision" ;(j) "of this section" ;(k) "of this subsection" ;(l) "of this regulation" ;(m) "of this subregulation" ;(n) "of this paragraph" ;(o) "of this subparagraph" ;(p) "of this clause" ;(q) "of this subclause" ;(r) "of this item" ;(s) "before-mentioned" ;(t) "afore-mentioned" ;(u) "hereof" or "hereto" ;(v) "thereof" or "thereto" ;(w) "said" or "aforesaid" .