3.

The technical specifications shall be formulated in any of the following ways: by reference to European standards, or to European technical approvals or common technical specifications, where such exist, to international standards, to other technical reference systems established by European standardisation bodies or, failing this, their national equivalents; every reference shall be followed by the expression ‘or equivalent’; in terms of performance or of functional requirements, which may include environmental characteristics and shall be sufficiently detailed to enable tenderers to determine the purpose of the contract and the contracting authorities to award the contract; by a mixture of those two formulation methods.

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Source: EUR-Lex (Cellar) · retrieved 2026-11-04 · Text as adopted (Official Journal); later amendments are not incorporated in this text.