All Samples, Instruments and Presets provided by Native Instruments may be used for commercial music production and compositions anytime without any further permission by Native Instruments.
Some content included in Native Instruments products belongs to third-party vendors. In this case, the license and copyright terms of the respective third party are legally binding. These licenses do vary, but you may also use this content for commercial music production without any further permission.
Detailed information about third-party content can be found online:
It is only strictly prohibited to use single, combined or modified sounds from Native Instruments to create sample CDs, loop libraries, sound libraries or similar products, as the license granted is strictly limited to one person only - any trading, lending, renting, reissuing, re-distribution or re-sale of sounds is not permitted under any circumstances.