The freedom of association is protected by Article 11 of the Constitution, except on the grounds of defence, public safety, public order, public morality and public health. The Constitution particularly recognises the right to form trade unions and other associations for the protection of interests. CSOs classed as non-governmental organisations (NGOs) must register with the Attorney General as non-profit organisations, with the right to seek judicial review if registration is refused. Constitutional rights are generally upheld, and advocacy groups are reported as being able to operate without interference. Workers in general have the right to organise, bargain collectively and strike, but there are additional restrictions on the ability to strike of workers in major agricultural industries. LGBTI human rights defenders experience threats and physical attacks, and may be forced to operate underground; police action on attacks is lacking.