There are, as far as I know, no restrictions on the day. One religious community I know uses incense on Sundays and other solemnities, but not on weekdays. It does say priest, but it does not say who does the incensing. No. 256 says:During the gospel canticle at morning prayer and evening prayer there may be an incensation of the altar, then of the priest and congregation.
No. 258 says:It belongs to the presiding priest or deacon, at the chair, to open the celebration with the introductory verse, begin the Lord's Prayer, say the concluding prayer, greet the people, bless them, and dismiss them.
Presumably, the altar is in the sanctuary, which could pose a problem in the «absence of a priest or deacon» and incensing the people is a form of blessing. That being said, I see no reason not to light incense, even if you don’t go waving it around.In the absence of a priest or deacon, the one who presides at the office is only one among equals and does not enter the sanctuary or greet and bless the people.
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