Forfeiture of exemption: trusts holding shares in concerns of author/connected persons risk loss of tax exemption depending on holding extent. The expression funds of the trust includes all trust property, including shares; section 13(2)(h) applies where such funds are invested in a concern in which the author or connected persons have a substantial interest either when invested during the relevant previous year or where pre existing investments continue to remain invested during that year. If the trust continues to hold such investments after the prescribed cut off, exemption is forfeited; complete forfeiture follows when the holding exceeds the statutory capital threshold, while only income from the investment is disqualified where the holding does not exceed that threshold.