are often the subject of transfer, the law does distinguish between them, using the term
“assignment” to refer to the transfer of contractual rights and the term “delegation” to refer
to the transfer of contractual duties. * * *
Restatement §317 defines the assignment of a right as “a manifestation of the assignor’s
intention to transfer it by virtue of which the assignor’s right to performance by the obligor
is extinguished in whole or in part and the assignee acquires a right to such performance.”
Section 317(2) permits a contractual right to be assigned unless (a) “the substitution of a
right of the assignee for the right of the assignor would materially change the duty of the
obligor, or materially increase the burden or risk imposed on him by his contract, or
materially impair his chance of obtaining return performance, or materially reduce its value
Although using somewhat different language, we have adopted those principles. In
Macke Co. v. Pizza of Gaithersburg, [citation], we held that “in the absence of a contrary
provision … rights and duties under an executory bilateral contract may be assigned and
delegated, subject to the exception that duties under a contract to provide personal services
may never be delegated, nor rights be assigned under a contract where delectus personae
was an ingredient of the bargain.”
These general statements, both in §§317 and 318 and in Macke regarding the extent to
which rights may be assigned and duties of performance may be delegated are, as noted,
subject to any valid contractual provision prohibiting assignment or delegation. Section 19.1
* * *
* * * The APSA involves a great deal more than merely a resale of electricity purchased
from Panda and even more than the effective substitution of one customer for another. Much
of Panda’s control over its own facility and business was subject to the approval and
cooperation of PEPCO; indeed, to a large extent, the operation of the facility was, in many