“…This is the case in three of the most relevant accounts of adult English L2 subjects, namely White (1985White ( , 1986, Phinney (1987) and Tsimpli and Roussou (1991), which followed Rizzi (1982Rizzi ( , 1986. As for subjects in child L2 English, Hilles (1991) and Lakshmanan (1991Lakshmanan ( , 1994) study them on the basis of the Morphological Uniformity Principle (MUP) (Jaeggli and Safir, 1989), which states that null subjects are only licensed in languages with uniform verb paradigms and that the acquisition of the Null Subject Parameter should be related to the emergence of verbal inflection. Wakabayashi (2002), for adult L2 English, and Park (2004) for child L2 English, which compare the L2A of the non-allowed null subjects in English by Japanese and Spanish native speakers, adopt the Minimalist Program framework and its claim that language acquisition involves the learning of formal features and finally, Mobaraki et al (2008) discuss in relatively traditional terms whether child L2 English subject use indicates presence/absence of functional projections in early child grammars in comparison to child L1A.…”