source: It shall be sufficient in making proof of this Agreement to produce or account for a facsimile or pdf copy of an executed counterpart of this Agreement.
target: It shall be sufficient in making proof of this Agreement. The proof should produce or account for a facsimile or pdf copy of an executed counterpart of this Agreement.
references: It shall be sufficient in making proof of this Agreement. The proof should produce or account for a facsimile or pdf copy of an executed counterpart of this Agreement.