The NUJ has declared that it will support any of its members at the BBC if they choose not to cross picket lines during the strike by production staff.
Last week, Bectu members at BBC Television News in London voted for strikes in protest against established rota patterns being changed.
Bectu supervisory official Luke Crawley said he expected the action to cause the BBC significant problems in covering the State Opening of Parliament on 15 November.
NUJ broadcasting organiser Paul McLaughlin told Press Gazette: "We will be instructing NUJ members not to carry out any duties normally undertaken by the people involved in the dispute.
"If there is a picket line, there will be NUJ members who will not want to cross that line and if they were to do that, we would fully support them, although legally we cannot instruct people not to cross, as that would be in breach of the law."
A BBC spokeswoman said: "We are disappointed that Bectu members have decided on this course of action. We have contingency plans in place and will work towards minimising disruption as far as possible."