According to secretary of the SLPA employees union Chandrasiri Mahagamage, there has been a delay by the management in giving them an answer in that regard.
The SLPA, as a semi-government institution, gives three-yearly salary increases to its employees.
They were last given a pay hike, of 15 per cent plus a Rs. 9,000 allowance, in 2015.
When a salaries committee met in September last year to discuss the matter, TUs submitted their proposals.
The committee met twice again to review those proposals.
On January 22, subject minister Mahinda Samarasinghe told a meeting that there would be a Rs. 500 salary increase and a Rs. 5,000 allowance.