The instrumental music during Midoriya's monologue on My Hero Academia season 3's prologue Every episode starts with Midoriya's monologue,

The prestigious school that turned out many heroes, UA high school
enrolled in there hero course I continue to run towards my dreams... [...]

During this scene, there is an instrumental song that plays in the first 18 seconds of the show.
What is this instrumental song?
This one is about the first 30 seconds of "Combat Liscense!".

It's the 5th song of disk 2 for the third OST (My Hero Academia 2018 Original Soundtrack) 

Link to Amazon MP3 JP for preview, proof and a possible where to buy.

Note: track is about half way down under the Kanji 戦闘許可!