Criminal Code Warning: this is not an official translation. Under all circumstances the original text in Dutch language of the Criminal Code (Wetboek van Strafrecht) prevails

Section 139 
1.   Any person who unlawfully enters a room or premises designated for public service, or who, 
unlawfully remaining there, does not leave immediately after having been directed to do so by the 
competent official, shall be liable to a term of imprisonment not exceeding three months or a fine of 
the second category.  
2.   Any person who has gained access by means of forcible entry or climbing in, or by false keys, a 
false order or a false uniform, or who, having entered without the prior knowledge of the competent 
official and not by mistake, is found there at night-time, shall be deemed to have unlawfully 
entered.  
3.  If he utters threats or employs means that could cause fear, he shall be liable to a term of 
imprisonment not exceeding one year or a fine of the third category.  
4.  The terms of imprisonment prescribed in subsections (1) and (3) may be increased by one third if 
two or more persons commit the serious offence in concert.