If you copied an ILS from the Portal and made substantial changes to its content and structure, then you may republish it as an author. However, it is always recommended to reference to the original ILS and its author by providing its web-link and name. For example, you can do it in the ILS description in Golabz or in the description of your ILS in Graasp (in this case the reference will appear in the standalone view of the ILS). You may add a text like “this ILS is based on the ILS … which was originally developed by …”). We are working on an automatic reference system, which will do this work for you in the future.