This is an unofficial version of a Massachusetts General Law.
Section 2-608
(a) In the absence of a requirement that a power of appointment be exercised by a reference, or by an express or specific reference, to the power, a general residuary clause in a will, or a will making general disposition of all of the testator's property, expresses an intention to exercise a power of appointment held by the testator only if (i) the power is a general power and the creating instrument does not contain an effective gift if the power is not exercised or (ii) the testator's will manifests an intention to include the property subject to the power.
(b) Unless a contrary intent is manifested in the terms of an instrument creating or limiting a power of appointment, it shall be presumed that the person so creating or limiting such power intended to authorize the donee thereof, when exercising said power, not only to create absolute interests but also to create less than absolute legal and equitable interests, including interests in trust for the benefit of objects of said power even though the trustees thereof may not be objects of said power and including new powers of appointment, general or more limited, in objects of said power, even though the objects of the new powers may include one or more that are not objects of said power.