However, this also varies from parish to parish so check with your parish leaders. When the lector comes from the assembly to proclaim the reading, it creates a clear sense that the ministries flow from the assembly. There isn't an absolute rule, but generally, what is carried in the opening procession is carried out at the end of Mass. 8. Lectors should dress up. Proclaiming the Word of God is a sacred ministry, and lectors should dress as though they have a sacred calling.
Casual dress gives an air of the ministry being casual.
So even though the ideal is to dress up, lectors need to be careful not to criticize each other about how they dress. What is casual for one person may be dressy for another. There would ordinarily be one lector for each reading. If lectors do all the preparation required of one reading, it would be quite difficult and time consuming to prepare two. Even if a lector was willing to put in the work required to prepare two readings, one would wonder why a second lector wouldn't be scheduled to do one of the readings.