(20)For the purposes of estimating the value of a given procurement, it should be clarified that it should be allowed to base the estimation of the value on a subdivision of the procurement only where justified by objective reasons. For instance, it could be justified to estimate contract values at the level of a separate operational unit of the contracting authority, such as for instance schools or kindergartens, provided that the unit in question is independently responsible for its procurement. This can be assumed where the separate operational unit independently runs the procurement procedures and makes the buying decisions, has a separate budget line at its disposal for the procurements concerned, concludes the contract independently and finances it from a budget which it has at its disposal. A subdivision is not justified where the contracting authority merely organises a procurement in a decentralised way.