The implication for the behaviour of the tax administration and the taxpayer of the rules governing burden of proof should be taken into account. For example, where as a matter of domestic law the burden of proof is on the tax administration, the taxpayer may not have any legal obligation to prove the correctness of its transfer pricing unless the tax administration makes a prima facie showing that the pricing is inconsistent with the arm’s length principle. Even in such a case, of course, the tax administration might still reasonably oblige the taxpayer to produce its records that would enable the tax administration to undertake its examination. In some countries, taxpayers have a duty to cooperate with the tax administration imposed on them by law. In the event that a taxpayer fails to cooperate, the tax administration may be given the authority to estimate the taxpayer’s income and to assume relevant facts based on experience. In these cases, tax administrations should not seek to impose such a high level of cooperation that would make it too difficult for reasonable taxpayers to comply.