The guidelines' highlight is:
> Minimising the passage through areas with nature protection (namely the Natura 2000 network and National Network of Protected Areas)
When compliance with the abovementioned point is impossible, then:
> The route must avoid passing through zones where birds congregate in large numbers (e.g. wet zones);
> The conductors must be at least 1.5 metres apart, otherwise they must be duly insulated with individual sheathing.
> Rigid insulators must not be used in the construction of new high voltage lines. This practice should continue with medium voltage lines and supplemented, whenever necessary, by sheathing the conductors where attached to the insulators.
> The installation of horizontal breakers at the top of the pylons is solely permitted in the reversed position on high voltage lines. The use of horizontal breakers at the top of the pylons on medium voltage lines is not permitted. Vertical breakers must be positioned at least 35 cm from the top of the pylon.
> High and medium voltage lines should carry warning signalling to minimise the risks of collision with aircraft.
> Anti-perching and anti-nesting devices should be deployed on high and medium voltage pylons to reduce the electrocution risk.
> The double dead-end lines at overhead transforming stations must be 25 cm from the top of the pylon and the jumpers should always traverse below the top of the pylon. The overhead transforming stations and dead-end poles should always be supplemented with the installation of anti-perching and anti-nesting devices.