Liverpool will have to wait until Marco Bueno's 18th birthday to try and secure the player's signature.
The Mexican striker, dubbed 'the new Chicharito' by Clubcall, emerged as a target for the Reds during the U17 World Championships in his homeland, and after helping his country win the tournament he enjoyed a ten-day trial on Merseyside.
However, the teenager returned home without signing a Liverpool deal, and played his first senior game for Pachuca over the weekend.
Newspaper reports in central America claim Kenny Dalglish remains keen on bringing the teenager to Anfield, but Pachuca sports vice president Andres Fassi insists Liverpool must now wait until March 31st 2012, when the player celebrates his 18th birthday.
"We received a letter last week from Liverpool, who want the player to go there when he turns 18," said Fassi.
"Maybe Liverpool will then make an offer, but that would not be until he is 18 years old, when FIFA's laws allow."
Bueno would join a promising crop of young players at Anfield should he move to Liverpool, with Raheem Sterling, Adam Morgan and Jack Robinson all climbing the ranks at the club.