Formal safety work is naturally important too; laws, rules and regulations must be complied with, there must be a management system with policies, procedures, follow-up, feedback, audits, certification and standards. This is not always sufficient though, and informal safety work carried out by committed individuals, work in safety organisations and trade unions, discussions and safety culture must also be encouraged. A good safety culture can provide support and act as a guide for human assessments and decisions in individual situations where instructions are either not in place or are inadequate. A good safety culture means that the parties involved work with a preventive (proactive) perspective. In the long term it may lead to less need for reactive rules in the areas of maritime safety and the work environment, as well as rules become fewer and with a lower level of detail.