---pagebreak--- 18 . 12 . 89 Jornal Oficial das Comunidades Europeias N? L 368 / 181 Appendix A All public support to the steel industry is prohibited under the terms of this Agreement with the following exceptions: 1 . Public support for research and development Up to a maximum of 35 % net grant equivalent of the eligible costs as regards basic industrial research and 25 % in the case of applied research and development. Eligible costs are only those which are directly related to research and development, excluding those related to industrial application or commercial exploitation of the results. 2. Public support for environmental protection Up to a maximum of 15 % net grant equivalent of the investment costs directly related to the environmental measures concerned . 3 . Public support for social purposes Aid to costs of payment to workers made redundant or accepting early retirement by the permanent discontinuance , curtailment or change of activities of steel undertakings. 4 . Public support for closure Aid to meet closure costs additional to social costs mentioned in paragraph 3 to steel companies which for a period of not less than four consecutive years have been engaged in the production of steel products described in Article 3 of the Arrangement concerning trade in certain steel products and the Arrangements concerning trade in steel pipes and tubes between the US and EC and which permanently cease all such steel production by the entire company up to a maximum of the higher of the following two values: (a) the discounted value of the contribution to fixed costs obtainable from the plants over a three year period less the advantages obtained by the firm from the closure; or ( b) the residua] book value of the plants. Appendix B EG : The commitments deriving from Commission Decision 89 / 218 / ECSC of 23 December 1988 concerning aid that the Italian Government proposes to grant to the public steel sector as consented to