Advocacy Strategy of Belarusian NGOs

The leader of an organization is normally concerned about its prosperity and development. The leader makes sure that the mission of the organization is formulated and shared by all the stakeholders, the organizational culture is well built, development programs are worked out, personnel is trained, etc. Will all these efforts be successful, though, if the organization stays in unfavorable legal environment? What should one do if the legal norms of the state conflict with the practices of NGOs?