Key legal question
Whether the constitutional complaint was admissible despite non-payment of the required cost advance within the final deadline.
Extracted holding
The court refused to enter into the complaint because the appellant did not pay the advance or provide the required proof of timely payment within the non-extendable deadline.
Extracted reasoning
After a warning under Art. 62(3) BGG, failure to comply with the advance-payment order triggers non-entry under Art. 117 BGG in conjunction with Art. 108(1)(a) BGG.