X Marks the Spot? Why Driver’s Licenses Shouldn’t Be Gender Identity Statements

Last week in Kansas, Senate Bill 244 went into effect. One notable aspect is that this bill mandates that people enter bathrooms in government buildings according to their biological sex. What is interesting is that an individual violating this law can face a civil penalty of $1,000. But that is not the provision I want to cover today. This bill also requires that driver's licenses list biological sex instead of gender identity. 

For transgender individuals, this is not an abstract policy change. It alters a document that they use for multiple activities, which includes driving a vehicle, renting a car, interacting with police, applying for a loan, boarding an airplane, picking up a package, registering at a hospital, checking into a hotel, and signing a lease. Critics of this bill argue that it imposes stigma, creates daily friction, and opens transgender people to harassment and discrimination. 

One criticism of this bill that I will agree with is that there was next to no grace period given for transgender people to acquire a new driver's license. It is true that a retroactive invalidation with no grace period is harmful and an example of poorly drafted legislation. Bureaucracies should do their utmost to not create avoidable chaos, although that might be too big of an ask. 

Yet beneath the procedural misstep is a more fundamental issue, mainly that a driver's license is a form of legal identification, not a canvas for personal self-identification.  As I explained last year, gender identity lacks clear operational boundaries and is not something that the government can consistently or meaningfully verify due to its incoherent and subjective nature. Because gender identity cannot be defined or verified with consistency, it is an unsuitable basis for a legal document and has no practical utility. 

By contrast, biological sex is a stable and verifiable category that reduces ambiguity and keeps administrative processes consistent and secure. While not as crucial as a photo, name, or date of birth, a biological sex indicator on a driver's license still serves functions that gender identity cannot engender (pun intended). 

• Interactions with law enforcement: Driver's licenses are used to confirm identity during traffic stops, match individuals to warrants, and identify suspects from descriptions. Physical descriptions often include biological sex, which correlates with bone structure, facial structure, height and weight distribution patterns, and voice patterns. While an officer may rely most heavily on the photo, name, and date of birth, biological sex remains a verifiable descriptive element that gender identity does not consistently provide. 

• Medical and emergency contexts: Driver's licenses are not designed as medical records, yet biological sex can occasionally aid identification in emergencies and provide context for drug metabolism differences, sex-specific conditions (e.g., ovarian cancer, testicular emergencies), baseline cardiovascular differences, and possible pregnancy. Biological sex has clinical relevance, whereas gender identity does not serve this function.

• Data integrity. Since it acts as an official source for administrative statistics, driver's license data has a downstream effect of feeding into accident statistics, crime reporting, public health research, and transportation safety analysis. Biological sex is empirically measurable and allows accurate sex-based comparisons. Gender identity does not provide such consistency for data analysis.

A driver's license is an administrative document for legal identification. Because the driver's license serves as a foundational identification document in modern civic life, the categories of information it contains should be objective, stable, verifiable, and resistant to self-attestation alone. Since gender identity is a subjective understanding of the self, it has no consistent administrative application. 

In addition to being an objective category, the characteristic should be necessary for identification or administrative purposes. Otherwise, why not add political affiliation, sexual orientation, religion, or Myers-Briggs type on a driver's license? Because legal identification is not meant to capture the fullness of who we are as individuals. 

It services the narrower purpose of anchoring a person to a stable, administrable record within a broader legal system. The more the state drifts from objective categories toward interior self-conception, the less it identifies and the more it validates someone's self-perception. A driver's license is for identifying people, not a self-affirmation tool. 

When identification becomes affirmation, it stops identifying anything at all. Validating someone's perception of self is not something the government should be in the business of doing because a category that means whatever anyone says it means, especially when it is not grounded in reality, ultimately means nothing.