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| General requirements |
| 1. MARC bib field 100/110/111 can only link to MARC authority record 100/110/111 without $t |
| 2. MARC bib field 240 can only link to MARC authority record 100/110/111 with $t |
| 3. When linking MARC bib field 240 to MARC authority 100/110/111, $t value controls/updates 240 $a. |
| 4. Can only link a bib field to one authority heading |
| 5. Indicator 2 - Will not apply validation when manually linking authority and bib fields... at least for Orchid release.Validation either Orchid/Poppy |
| 6. No authority control subfields can populate a bib field |
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