Current Vatican discipline does not present concelebration norms as “different” for Personal Ordinariates in the sources I have been provided. What I can assess confidently is the general Vatican/Church law for concelebration in the Roman rite, as given in the General Instruction of the Roman Missal (GIRM), and then explain how that framework would ordinarily govern an “Ordinariate Mass” when the Holy See’s approved liturgical books place that celebration under the Roman liturgical law.

General Vatican norms for concelebration (Roman Missal law)

Concelebration is fundamentally about unity of priesthood, sacrifice, and the People of God

GIRM grounds concelebration in theology: it “appropriately expresses the unity of the priesthood, of the Sacrifice, and also of the whole People of God.” 1

It also makes clear that concelebration is not optional everywhere: the rite itself prescribes it for certain moments. 1

When it is prescribed

GIRM states that concelebration is prescribed by the rite itself for:

• the Ordination of a Bishop and of priests
• the blessing of an abbot
• the Chrism Mass 1

So, in any “Ordinariate Mass” that corresponds to these prescribed rites under the Church’s liturgical books, the default Vatican norm is that concelebration is required (subject to feasibility and legitimate practice under the rubrics of the particular rite/edition). 1

When it is recommended

Unless the good of the faithful “requires or suggests otherwise,” concelebration is also recommended at several types of Mass, including:

• the Evening Mass of the Lord’s Supper
• Masses “during Councils, meetings of Bishops, and synods”
• the conventual Mass and the principal Mass in churches and oratories
• Masses at “any kind of meeting of priests” (secular or religious) 1

This is important for assessing Ordinariate practice: GIRM’s default posture is that concelebration is a strong “normal” option when priests are gathered or when the liturgy is principal/conventual in the proper sense. 1

Relationship between concelebration and individual Masses in the same place

GIRM draws a boundary: an individual priest is permitted to celebrate individually, but not at the same time as a concelebration is occurring in the same church or oratory. 1

There is a further strictness on major liturgies:

• On Holy Thursday
• for the Mass of the Easter Vigil GIRM says it is “not permitted” for an individual priest to celebrate individually (in the situation described). 1

Special emphasis: concelebration with the bishop at stational/major occasions

GIRM gives additional specificity about what should be “held in high regard”: concelebration in which priests of a diocese concelebrate with their own bishop at various solemn occasions, including stational Masses (especially on the most solemn days), Chrism Mass, the Evening Mass of the Lord’s Supper, and synod/pastoral visitation-related liturgies. 2

It also states that concelebration is recommended whenever priests gather with their bishop (e.g., retreats or other meetings), “for this same reason”—the unity sign of priesthood and Church becomes clearer. 2

How this framework applies to “Ordinariate Masses” (assessment with limits)

What can be assessed from the provided sources

From the above, the Vatican “baseline” is:

• Rite-prescribed concelebration (ordainings, Chrism Mass, abbatial blessing) is mandatory where those rites occur. 1
• Otherwise, concelebration is normally recommended in specific communal/major-church contexts, especially where multiple priests are gathered. 1
• A priest should not schedule a separate Mass simultaneously in the same church or oratory if a concelebration is taking place—particularly strict on Holy Thursday and the Easter Vigil context described by GIRM. 1
• There is strong liturgical prudence in concelebrating with the bishop when applicable, because the sign of ecclesial unity is clearer. 2

What I cannot responsibly claim from the provided material

Your question is specifically about “Vatican norms … in Ordinariate Masses.” However, the sources provided to me include no direct text on:

• how Personal Ordinariates specify concelebration in their Divine Worship rite books,
• whether ordinariate clergy have any distinct permissions/limitations,
• whether any particular dicastery document or instruction modifies concelebration practice in ordinariate celebrations.

So I cannot prove (from the supplied references) claims like “Ordinariates require/forbid X” beyond the general Roman norms already cited. 1

Likely practical conclusion (grounded only in general Roman norms)

Given GIRM’s statement that concelebration is prescribed or recommended according to the rite itself and pastoral/faithful-good considerations, a reasonable Catholic assessment is:

• If the Ordinariate Mass is celebrated according to the Church’s approved liturgical law for that rite, then GIRM’s general principles and prohibitions about simultaneously celebrating individually in the same church/oratory would govern unless a special norm (not included in my provided sources) explicitly overrides them. 1
• On Holy Thursday and the Easter Vigil, the restriction against individual celebrations in the described circumstances is especially weighty for maintaining liturgical order and unity of the community around the principal liturgy. 1

Key “checkpoints” to apply when judging a specific Ordinariate scenario

When you assess a particular Ordinariate liturgy for whether concelebration is required/recommended and whether individual celebration is licit at the same time, use these GIRM checkpoints:

• Is the Mass actually a rite that GIRM says is prescribed for concelebration? (ordination, abbatial blessing, Chrism Mass) 1
• Is this a principal/conventual Mass, or a major communal moment where priests are gathered? (then concelebration is recommended unless the faithful-good suggests otherwise) 1
• Is there a concelebration in the same church/oratory at the same time? If yes, individual celebration by another priest is not permitted (and on Holy Thursday/Easter Vigil it is especially prohibited in the described way). 1
• If a bishop is involved, is the Mass one where concelebrating with the bishop is especially valued? (stational/solemn occasions, Chrism Mass, Lord’s Supper evening, synod/visitation occasions) 2

Conclusion

With the sources provided, the strongest, certifiable answer is that Vatican norms in GIRM establish a universal theology-and-discipline baseline for concelebration: prescribed in certain rites, strongly recommended in certain major communal settings, and coordinated with strict limits on simultaneous individual Masses in the same place—especially Holy Thursday and the Easter Vigil context. 1 3 2

However, I cannot state Ordinariate-specific modifications to this discipline without additional Ordinariate documents or the relevant Vatican/diocesan instructions for the Ordinariate liturgical books (none are included in the references you supplied). 1