Arturo Márquez (born 1950) is very much alive and active. His works, including the famous Danzón No. 2 and the Conga del Fuego , are published by and Ediciones Mexicanas de Música . Because these are protected works (copyright lasts for the life of the composer plus 70 years in most jurisdictions), sharing the full score on IMSLP would be illegal.
Arturo Márquez was born in 1950 and is very much active today. Under international copyright law, his works remain under copyright protection in most jurisdictions (usually life of the composer plus 70 years).
Many musicians search for this piece on (International Music Score Library Project), hoping for a public-domain download. However, because Arturo Márquez (born 1950) is a contemporary composer, his works are strictly protected by copyright.
While you can't get the parts, IMSLP is still useful for this piece.