It's not that complicated. However, in line with the last answer as well, your question lays different levels. When government is planning the area where oil and gas exploration is to take place, it would be natural to engage with the Sami Parliament, the representative body of the Sami people in Norway.
There's no offshore oil and gas in Finland and Sweden.
On the seismic testing and other levels, when you get into the local level, actually starting the project, the people representing those who are in or near that area would be the ones to consult at that level. Throughout the process, there are different processes and different levels of Sami participation.