Like all open-source licenses, OPL-1 includes the standard "as-is" warranty disclaimer. The software comes without any warranty of merchantability or fitness for a particular purpose. The authors are not liable for any damages.
You cannot sublicense the software. This means you cannot take OPL-1 code and re-license it under a different set of terms, even if you pay the original author. The license is irrevocable and attached to the code permanently. opl-1 license
Unlike the GPL, the OPL-1 explicitly states that you may not distribute the software in binary/compiled form without also distributing the complete corresponding source code. (Some GPL versions allow binary distribution with a written offer for source; OPL-1 is more strict here). Like all open-source licenses, OPL-1 includes the standard