Change contributions provisions under the Cities of the First Class Firefighters Retirement Act

This bill adjusts retirement contribution rates for firefighters in Nebraska cities of the first class (over 60,000 residents). It increases firefighter contributions from 6.5% to 12.7% of salary over time (2024-2026), but exempts those working in cities over 60,000 residents within counties over 100,000 population (like Omaha) from the higher rates starting March 2025 - they pay only 6.5%. Cities must cover these contributions directly instead of deducting from firefighters' paychecks, and the bill repeals previous contribution rules. These changes apply specifically to firefighters in eligible cities participating in the retirement system.