43. This distinction, between „recognition of the institution‟, and „permission to start a course in the recognised institution‟, is also underscored by the considerations, to be borne in mind, while assessing the application, whether for recognition or permission, as visualised by clause (a) of sub- section (3), of Section 14 (in the case of recognition) and Section 15 (in the case of permission). Section 14(3)(a) requires the application, by the institution, for grant of recognition to the institution, to be examined by assessing whether “such institution has adequate financial resources, accommodation, library, qualified staff, laboratory” and whether “it fulfils such other conditions required for proper functioning of the institution for a course or training in teacher education ”. As against this, Section 15(3)(a) stipulates “adequate financial resources, accommodation, library, qualified staff, laboratory” and fulfilment, by the institution, of “such other conditions required for proper conduct of the new course or training in teacher education ”, as the relevant criteria, to be borne in mind while granting permission, to the institution, to start a new course or training in teacher education. The difference, between the expressions italicised in the afore-extracted words, from Section 14(3)(a) and Section 15(3)(a), of the NCTE Act, are not legislative tautology. It is a cardinal principle, of interpretation of statutes, that, where, in parallel provisions of the same statutory instrument, different expressions are used by the legislature, such different usage is to be treated as deliberate, and with a purpose. It is not permissible, while interpreting the instrument, either to overlook such different usage, or to interpret the provisions concerned, in a manner which would efface the intent behind such different usage. While assessing