19.—(1) Basic mother plants grown from pre-basic material may be multiplied in a number of generations to obtain the necessary number of basic mother plants.
(2) A basic mother plant must be multiplied in accordance with paragraph 13 and, for the purposes of this sub-paragraph, a reference to a pre-basic mother plant in paragraph 13 is to be construed as a reference to a basic mother plant.
(3) The maximum permitted number of generations, and the maximum permitted life span of basic mother plants must not exceed the limits set out in Annex V to Directive 2014/98/EU for the relevant genera or species.
(4) Where multiple generations of basic mother plants are permitted, each generation, other than the first one, may derive from any previous generation.
(5) Propagating material of different generations must be kept separate.