The experts invited by the LDAC Secretariat to give a presentation or actively participate in a scientific, technical or political discussion over a topic of interest relevant for the meeting, or that contribute with their knowledge to inform the shaping and drafting of future advice and works of the LDAC, might be entitled to reimbursement in analogue conditions to those of the members, subject to prior agreement and signing of an expert contract, in accordance with the stipulations included in the LDAC rules for reimbursement.