(ii)[ the relevant income is receivable ] [Substituted by Act 19 of 1970, Section 21, for Section 164 (w.e.f. 1.4.1971).][under a trust declared by any person by will and such trust is the only trust so declared by him] [ Substituted by Act 44 of 1980, Section 27, for certain words (w.r.e.f. 1.4.1980).]; or