When negotiating a new contract between an employer and an IBEW Local Union, the NEBF clause in the contract needs to be correctly worded to bind both parties to fulfill their obligations.
The following language, which may also be downloaded must be included in the Collective Bargaining Agreement in order for contributions to be made to the NEBF.

Section 6.01.  It is agreed that in accord with the Employees Benefit Agreement of the National Electrical Benefit Fund ("NEBF"), as entered into between the National Electrical Contractors Association and the International Brotherhood of Electrical Workers on September 3, 1946, as amended, and now delineated as the Restated Employees Benefit Agreement and Trust, that unless authorized otherwise by the NEBF the individual Employer will forward monthly to the NEBF's designated local collection agent an amount equal to 3% of the gross monthly labor payroll paid to, or accrued by, the employees in this bargaining unit, and a completed payroll report prescribed by the NEBF.  The payment shall be made by check or draft and shall constitute a debt due and owing to the NEBF on the last day of each calendar month, which may be recovered by suit initiated by the NEBF or its assignee.  The payment and the payroll report shall be mailed to reach the office of the appropriate local collection agent not later than fifteen (15) calendar days following the end of each calendar month.

The individual Employer hereby accepts, and agrees to be bound by, the Restated Employees Benefit Agreement and Trust.
 
An individual Employer who fails to remit as provided above shall be additionally subject to having this agreement terminated upon seventy-two (72) hours notice in writing being served by the Union, provided the individual Employer fails to show satisfactory proof that the required payments have been paid to the appropriate local collection agent.

The failure of an individual Employer to comply with the applicable provisions of the Restated Employees Benefit Agreement and Trust shall also constitute a breach of this Agreement.