It is not identical to a DPS in that it does not allow new suppliers to be added at any time, only at certain, fixed joining points which are set out at the beginning of the life of the framework.
Section 49(4) does contain detail around the circumstances where an existing supplier who is already on the open framework can be reappointed to its next iteration, without the need for further competition. However, it does not contain detail on how new suppliers may join the open framework at a joining point, although this is clearly contemplated as being possible (see paragraph 322 of the Explanatory Notes to the Act). This is an area where we are expecting further policy/guidance to clarify the position (expected in February 2024). Given that the open framework can only be reiterated where it is on substantially the same terms as previously, we presume that the same quality/price/social value criteria will need to be used.