Proving Undue Hardship Before You Deny a Religious Accommodation

When an employee asks for a religious accommodation to a health or safety policy, the denial file should already contain the safety margin, the expert support, and the guidance you relied on. A jury gave six former BART employees $7,824,580 in a Title VII case alleging that BART did not accommodate their religious objections to a COVID-19 vaccine mandate. The Lewis-Williams v. S.F. Bay Area Rapid Transit District panel upheld the jury verdict on the ground that sufficient evidence supported it. The opinion was issued by Judge Ryan Nelson, with Judges Johnnie Rawlinson and Bridget Bade joining.

The safety margin decides the denial

The panel required BART to prove that any alternative to vaccination would be less safe by a material margin. That standard makes the denial a measurement exercise: a baseline, an alternative, and a defensible margin between them. If the margin is small, the accommodation should survive. A policy can be reasonable, but the denial fails if the record cannot show the margin. Put the margin in the file before you ask anyone to accept it.

Build the proof before the request

A defensible denial file answers what the policy required, what the employee asked for, and why the safety margin is too large. Work in that order, because the employee should not have to reconstruct your reasoning from a denial letter.

• Identify the exact alternative. Write down what the employee asks for and what your policy requires. For remote work, name the on-site function at issue. For a schedule change, name the safety control that depends on the current schedule. The comparison should show the requested practice, the workplace risk, and the specific control you say fails.
• Quantify the safety margin. Put numbers, rates, or observable failure modes in the file. Use the unit that matches the risk: exposure time, distance, protective equipment failure rate, vaccination coverage, or incident rate. Where measurement is not possible, state the observable fact that would show the risk. A short memo can explain why the alternative is less safe by a margin large enough to justify denial.
• Secure contemporaneous expert testimony. Call the people who helped set the policy while the facts are fresh. The expert should explain the policy decision at the time it was made. A later expert can summarize the science, but contemporaneous testimony is stronger. A declaration or deposition from the expert who advised you is stronger than a consultant hired after the dispute starts.
• Put public-health guidance in the record. Save the guidance you relied on. Where it changed, keep the version that was in force when the policy was adopted. A later update does not cure a missing earlier document. An exhibit list lets a reviewer check the guidance without asking your team to remember.
• Separate legal requirement from good practice. Mark which parts of the policy are legally required and which are internal preferences. Do not let a values statement do the work of a safety analysis. When the letter says the policy protects the team, it should also say how the alternative undermines that protection. The denial letter should cite the safety margin, not a general statement about company values.

The common failure is to assemble the file after the employee asks. By then, the people who made the policy are busy, the guidance has changed, and the explanation sounds defensive. Build the file before the request arrives.

The record shows the failure mode

BART failed to present testimony from the infectious disease experts or the public health officials its pandemic task force had consulted when creating its vaccination policy. Instead, BART relied on two after-the-fact litigation experts, Dr. Joseph Lewnard and Dr. Nancy McClellan, to explain public health guidance and the risks of allowing unvaccinated employees to work in person. The public-health guidance BART invoked was absent from the record. The missing experts and missing guidance show why the record, not the policy, drives the defense.

Keep the legal line visible

The legal question is narrow: whether the requested alternative creates a safety problem severe enough to justify denial. The good-practice question is broader: whether the policy is the least intrusive way to protect the workplace. Write both into the file, but label them differently. A denial should rest on the legal question. A policy revision can address the rest. When you write the denial, keep it short. State the requested accommodation, the safety concern, the expert basis, and the guidance in the record. Offer to discuss a different alternative if the employee can identify one.