The answer is FALSE.
Both teams must work together to come up with a common definition of the terms.
1) Determine how to classify leads
2) Assess and determine on how identified leads will be contacted (by salesperson or by automated email marketing)
A marketing qualified lead is defined as a lead of interest. It means that the lead fits the predetermined qualifications. Its reaction to email marketing will determine whether this MQL will become a SQL.
A sales qualified lead is defined as a hot lead. It means that the salesperson must contact the lead within 48 hours because the probability of closing a sale is high.