I don’t think the norm for reserving the Eucharist applies to exposition of the Eucharist.
Can. 941 §1. In churches or oratories where it is permitted to reserve the Most Holy Eucharist, there can be expositions with the pyx or the monstrance; the norms prescribed in the liturgical books are to be observed.
§2. Exposition of the Most Blessed Sacrament is not to be held in the same area of the church or oratory during the celebration of Mass.
If there is going to be perpetual adoration, that cannot be in the main church, because Mass is celebrated in the main church. In my experience, though, there is usually no tabernacle in use a perpetual adoration chapel. Either the Eucharist is there and exposed in a monstrance or the Eucharist is not there at all. I have always assumed the tabernacle is only there for the emergency situation in which someone was forced to leave the chapel for reasons beyond their control and had no one else there to continue in attendance.
It is allowed to have a tabernacle in another chapel, with permission of the bishop. All perpetual adoration chapels are established with permission of the bishop, so there would not be a problem:
Can. 934 §1. The Most Holy Eucharist:
1/ must be reserved in the cathedral church or its equivalent, in every parish church, and in a church or oratory connected to the house of a religious institute or society of apostolic life;
2/ can be reserved in the chapel of the bishop and, with the permission of the local ordinary, in other churches, oratories, and chapels.
§2. In sacred places where the Most Holy Eucharist is reserved, there must always be someone responsible for it and, insofar as possible, a priest is to celebrate Mass there at least twice a month.
I would not think an adoration chapel in which the Blessed Sacrament is exposed for adoration but normally not reserved in a tabernacle would need to be a place where Mass is celebrated twice a month, provided it is on the same campus as a church that celebrates Mass on a regular basis.