Are there any conditions under which the President could refuse to lay before each House of Parliament, a copy of the report from the Union Commission?
No, there are no conditions under which the President could refuse to lay before each House of Parliament, a copy of the report from the Union Commission. The duty of the President is to receive the report and cause a copy thereof along with a memorandum explaining the reasons for non-acceptance of the Commission's advice in certain cases, to be laid before each House of Parliament.