In consideration for the right to licence this data Global has...

In consideration for the right to licence this data Global has agreed to transfer to National Petroleum Corporationof Namibia (“NAMCOR”) a 7 per cent participating interest in PEL0094. NAMCOR holds an existing 10 per centcarried interest as required by the Namibian Government, and its total interest in PEL0094 will therefore be 17per cent, carried to first production.

says 7% participating interest in PEL0094....but then says 17% (7+10) carried through to first production???? How does that work?