7 U.S. Code § 2483 - Contents and term of plant variety protection
(1) Every certificate of plant variety protection shall certify that the breeder (or the successor in interest of the breeder),  has the right, during the term of the plant variety protection, to exclude others from selling the variety, or offering it for sale, or reproducing it, or importing it, or exporting it, or using it in producing (as distinguished from developing) a hybrid or different variety therefrom, to the extent provided by this chapter.
(2) If the owner so elects, the certificate shall—
(A) specify that seed of the variety shall be sold in the United States only as a class of certified seed; and
(3) An owner may waive a right provided under this subsection, other than a right that is elected by the owner under paragraph (2)(A).
(1) In general
Except as provided in paragraph (2), the term of plant variety protection shall expire 20 years from the date of issue of the certificate in the United States, except that—
(A) in the case of a tuber propagated plant variety subject to a waiver granted under section 2402 (a)(1)(B)(i) of this title, the term of the plant variety protection shall expire 20 years after the date of the original grant of the plant breeder’s rights to the variety outside the United States; and
(c) Expiration upon failure to comply with regulations; notice
The term of plant variety protection shall also expire if the owner fails to comply with regulations, in force at the time of certificating, relating to replenishing seed in a public repository, or requiring the submission of a different name for the variety, except that this expiration shall not occur unless notice is mailed to the last owner recorded as provided in section 2531 (d) of this title and the last owner fails, within the time allowed thereafter, not less than three months, to comply with said regulations, paying an additional fee to be prescribed by the Secretary.
 So in original. The comma probably should not appear.
Source(Pub. L. 91–577, title II, § 83,Dec. 24, 1970, 84 Stat. 1551; Pub. L. 96–574, § 14,Dec. 22, 1980, 94 Stat. 3350; Pub. L. 103–349, §§ 7, 13 (m),Oct. 6, 1994, 108 Stat. 3140, 3143; Pub. L. 104–127, title IX, § 913(b),Apr. 4, 1996, 110 Stat. 1186.)
1996—Subsec. (b). Pub. L. 104–127, § 913(b)(1), (2), inserted heading, designated first sentence as par. (1), inserted par. heading, substituted “Except as provided in paragraph (2), the term” for “The term”, designated second sentence as par. (2), and inserted par. heading.
Subsec. (b)(1). Pub. L. 104–127, § 913(b)(3), which directed the amendment of par. (2) by striking out “except that, in the case” and inserting “except that—”, subpar. (A), and “(B) in the case”, was executed to par. (1) to reflect the probable intent of Congress.
1994—Subsec. (a). Pub. L. 103–349, § 7(1)(A), designated first through fourth sentences as pars. (1) to (4), respectively.
Subsec. (a)(1). Pub. L. 103–349, § 13(m)(1)(A), which directed the substitution of “(or the successor in interest of the breeder)” for “(or his successor in interest) his heirs and assignees”, was executed by making the substitution for “(or his successor in interest) his heirs or assignees”, to reflect the probable intent of Congress.
Subsec. (a)(2), (3). Pub. L. 103–349, § 7(1)(B), added pars. (2) and (3) and struck out former pars. (2) and (3) which read as follows:
“(2) If the owner so elects, the certificate shall also specify that in the United States, seed of the variety shall be sold by variety name only as a class of certified seed and, if specified, shall also conform to the number of generations designated by the owner.
“(3) Any rights, or all rights except those elected under the preceding sentence, may be waived; and the certificate shall conform to such waiver.”
Subsec. (a)(4). Pub. L. 103–349, § 13(m)(1)(B), substituted “the discretion of the Secretary” for “his discretion”.
Subsec. (b). Pub. L. 103–349, § 7(2), in first sentence substituted “20 years” for “eighteen years” and inserted before period at end “, except that, in the case of a tree or vine, the term of the plant variety protection shall expire 25 years from the date of issue of the certificate”.
Subsec. (c). Pub. L. 103–349, §§ 7(3), 13 (m)(2), substituted “repository, or requiring the submission of a different name for the variety, except that” for “repository: Provided, however, That” and “the last owner” for “he” before “fails”.
1980—Subsec. (b). Pub. L. 96–574substituted “eighteen” for “seventeen”.
Effective Date of 1994 Amendment