Adding/removing subjects with the "aliases" format

If a subject with the "aliases" format (RFC 9493 Subject Identifiers for Security Event Tokens, Section 3.2.8. Aliases Identifier Format) is added to a stream using the Add Subject Endpoint (OpenID Shared Signals Framework Specification 1.0, Section 8.1.3.2. Adding a Subject to a Stream) like below,

POST /ssf/subjects:add HTTP/1.1
Host: transmitter.example.com
Authorization: Bearer eyJ0b2tlbiI6ImV4YW1wbGUifQo=

{
  "stream_id": "f67e39a0a4d34d56b3aa1bc4cff0069f",
  "subject": {
    "format": "aliases",
    "identifiers": [
      {
        "format": "email",
        "email": "user@example.com"
      },
      {
        "format": "phone_number",
        "phone_number": "+12065550100"
      },
      {
        "format": "email",
        "email": "user+qualifier@example.com"
      }
    ]
  }
}

and then a subject with one of the aliases is removed from the stream using the Remove Subject Endpoint like below,

POST /ssf/subjects:remove HTTP/1.1
Host: transmitter.example.com
Authorization: Bearer eyJ0b2tlbiI6ImV4YW1wbGUifQo=

{
  "stream_id": "f67e39a0a4d34d56b3aa1bc4cff0069f",
  "subject": {
    "format": "email",
    "email": "user@example.com"
  }
}

how should the transmitter behave? Should events related to {"format":"email", "email":"user@example.com"} be still delivered via the stream or not?

Likewise, if two Add Subject calls with a simple subject are performed like below,

POST /ssf/subjects:add HTTP/1.1
Host: transmitter.example.com
Authorization: Bearer eyJ0b2tlbiI6ImV4YW1wbGUifQo=

{
  "stream_id": "f67e39a0a4d34d56b3aa1bc4cff0069f",
  "subject": {
    "format": "email",
    "email": "user@example.com"
  }
}

POST /ssf/subjects:add HTTP/1.1
Host: transmitter.example.com
Authorization: Bearer eyJ0b2tlbiI6ImV4YW1wbGUifQo=

{
  "stream_id": "f67e39a0a4d34d56b3aa1bc4cff0069f",
  "subject": {
    "format": "phone_number",
    "phone_number": "+12065550100"
  }
}

and then a Remove Subject request including the added subjects as aliases is made like below,

POST /ssf/subjects:remove HTTP/1.1
Host: transmitter.example.com
Authorization: Bearer eyJ0b2tlbiI6ImV4YW1wbGUifQo=

{
  "stream_id": "f67e39a0a4d34d56b3aa1bc4cff0069f",
  "subject": {
    "format": "aliases",
    "identifiers": [
      {
        "format": "email",
        "email": "user@example.com"
      },
      {
        "format": "phone_number",
        "phone_number": "+12065550100"
      }
    ]
  }
}

how should the transmitter behave? Should events related to the subjects be still delivered via the stream or not?

In other words, the question is whether an Add Subject / Remove Subject request with "format":"aliases" should be treated as a bulk operation on the subject identifiers listed in the "identifiers" array.

Read RFC 9493 Section 3.2.8 and the OpenID Shared Signals Framework Sections 8.1.3.2 and the Remove Subject Endpoint. Determine the intended behavior for adding and removing aliases, including whether aliases represent a bulk operation. Done means the specification clearly answers both examples.