Final answer:
The statement is true. Picket signs must clearly identify the primary employer as the target of picket activity and only urge a boycott of their products or services, not all products or services sold by a secondary employer.
Step-by-step explanation:
The statement given is true. Picket signs, which are used as a form of protest, must clearly identify the primary employer as the target of the picket activity and only encourage a boycott of the primary employer's products or services, not a total boycott of all products or services sold by the neutral, secondary employer.
For example, if there is a labor dispute between workers and the primary employer, the picket signs should clearly state the issues with the primary employer and call for a boycott of their products or services. The signs should not urge a total boycott of all products or services sold by another employer who may not be directly involved in the labor dispute. This ensures that the picket activity remains focused on the primary employer.