1. In the case of mixed contracts which have as their subject-matter procurement covered by this Directive as well as procurement covered by Article 346 TFEU or Directive 2009/81/EC, this Article shall apply.

2. Where the different parts of a given public contract are objectively separable, contracting authorities may choose to award separate contracts for the separate parts or to award a single contract.

Where contracting authorities choose to award separate contracts for separate parts, the decision of which legal regime applies to any one of such separate contracts shall be taken on the basis of the characteristics of the separate part concerned.

Where contracting authorities choose to award a single contract, the following criteria shall apply to determine the applicable legal regime:

(a) where part of a given contract is covered by Article 346 TFEU, the contract may be awarded without applying this Directive, provided that the award of a single contract is justified for objective reasons;

(b) where part of a given contract is covered by Directive 2009/81/EC, the contract may be awarded in accordance with that Directive, provided that the award of a single contract is justified for objective reasons. This point shall be without prejudice to the thresholds and exclusions for which that Directive provides.