[Code of Federal Regulations]
[Title 40, Volume 23]
[Revised as of July 1, 2007]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR155.42]

[Page 56-57]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 155_REGISTRATION STANDARDS AND REGISTRATION REVIEW--Table of Contents
 
                Subpart C_Registration Review Procedures
 
Sec. 155.42  Registration review cases.

    (a) Establishing registration review cases. A registration review 
case will be composed of one or more active ingredients and all the 
products containing such ingredient(s). The Agency may group related 
active ingredients into a registration review case when the active 
ingredients are so closely related in chemical structure and 
toxicological profile as to allow common use of some or all required 
data for hazard assessment.
    (1) Existing pesticides. The Agency will assign each pesticide 
registered on or before the effective date of this regulation to a 
registration review case.
    (2) New pesticides. The Agency will assign each pesticide registered 
after the effective date of this regulation to an existing registration 
review case or to a new registration review case.
    (3) A pesticide product that contains multiple active ingredients 
will belong to the registration review cases for each of its active 
ingredients.
    (b) Modifying registration review cases. New data or information may 
suggest that a registration review case should be modified. The Agency 
may modify a registration review case in the following ways:
    (1) Add a new active ingredient to a registration review case. The 
Agency may determine that a new active ingredient is chemically and 
toxicologically similar to active ingredients in an existing 
registration review case and should be grouped with the ingredients in 
the existing registration review case.
    (2) Split a registration review case into two or more registration 
review cases. For example, new data or information may suggest that 
active ingredients in a registration review case are not as similar as 
previously believed and that they belong in two or more separate 
registration review cases.
    (3) Move an ingredient from one registration review case to another. 
For example, new data or information might suggest that an ingredient 
should not be grouped with the other ingredients in the registration 
review case and that it belongs in a different registration review case.
    (4) Merge two or more registration review cases into a single 
registration review case. For example, new data or information might 
suggest that the active ingredients in two or more registration review 
cases should be grouped together for registration review.
    (5) Delete an active ingredient from a registration review case. For 
example, the Agency will remove the ingredient from the case if the 
registrations of all products containing an active ingredient in a 
registration review case are canceled.

[[Page 57]]

    (c) Closing a registration review case. The Agency will close a 
registration review case if all products in the case are canceled.
    (d) Establishing a baseline date for a registration review case. For 
the purpose of scheduling registration reviews, the Agency will 
establish a baseline date for each registration review case. In general, 
the baseline date will be the date of initial registration of the oldest 
pesticide product in the case or the date of reregistration, whichever 
is later. For the purpose of these procedures, the date of 
reregistration is the date on which the Reregistration Eligibility 
Decision or Interim Reregistration Decision was signed, whichever date 
the Agency determines to be more appropriate based on the 
comprehensiveness of the review.
    (1) The Agency generally will not change the baseline date for a 
registration review case when it modifies a case by adding or deleting 
ingredients or products.
    (2) When the Agency splits a registration review case into two or 
more cases, the new case(s) generally will have the baseline date of the 
original registration review case.
    (3) When the Agency merges two or more registration review cases 
into a single case, the Agency generally will use the earliest baseline 
date as the baseline date for the new case.
    (e) Announcing registration review cases and baseline dates. The 
Agency will maintain a list of registration review cases, including 
baseline dates, on its website.