Modifies provisions relating to unlawful discriminatory practices

HB 1558 updates Missouri's definitions for unlawful discrimination in employment, housing, and public accommodations. It clarifies that "age" for discrimination purposes covers 40-70 years (with limited retirement exceptions for executives), defines "disability" to exclude current illegal drug use but include those in rehabilitation, and expands "discrimination" to include unfair treatment based on protected characteristics like race, color, or familial status. The bill directly affects employers, housing providers, and businesses serving the public by revising how these terms are legally interpreted. It does not create new prohibitions but refines existing definitions to improve clarity in enforcement. (This is a definitional bill, not a procedural one.)